Resuggestion, Thanks to K1ng for the info!

Taking last 2 months (July 24 on)

Sale 1:

https://backpack.tf/profiles/76561198303508349#!/compare/1564272000/1564358400

https://backpack.tf/profiles/76561197994697258#!/compare/1564358400/1564444800

Untrace

sale 2:

https://backpack.tf/profiles/76561198336034192#!/compare/1564617600/1564704000

https://backpack.tf/profiles/76561198158206236#!/compare/1564617600/1564704000

Bulk

sale 3:

https://backpack.tf/profiles/76561198273595803#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198079697586#!/compare/1565913600/1566000000

SCM

sale 4:

https://backpack.tf/profiles/76561198079697586#!/compare/1566086400/1566518400

https://backpack.tf/profiles/76561198334598690#!/compare/1566432000/1566518400

QS

sale 5:

https://backpack.tf/profiles/76561198334598690#!/compare/1566691200/1566777600

https://backpack.tf/profiles/76561198067686988#!/compare/1566259200/1566777600

Sold for 9 keys

sale 6:

https://backpack.tf/profiles/76561198101519068#!/compare/1564012800/1564099200

https://backpack.tf/profiles/76561198057059610#!/compare/1562630400/1564185600

SCM / not unusual

Sale 7:

https://backpack.tf/profiles/76561198081232115#!/compare/1564444800/1564617600

https://backpack.tf/profiles/76561198281711832#!/compare/1562716800/1564704000

Sold for 9 keys

Sale 8:

https://backpack.tf/profiles/76561198281711832#!/compare/1565308800/1565654400

https://backpack.tf/profiles/76561198082095496#!/compare/1565568000/1565654400

Sold for ~7.5 keys

Sale 9:

https://backpack.tf/profiles/76561198082095496#!/compare/1565568000/1565654400

https://backpack.tf/profiles/76561198194316734#!/compare/1565654400/1565913600

Sold for G Fetti Mullet + ~1 key in sweets

Sale 10:

https://backpack.tf/profiles/76561198069588637#!/compare/1562630400/1562803200

https://backpack.tf/profiles/76561198092787248#!/compare/1562716800/1562803200

Sold for 10 keys

Sale 11:

https://backpack.tf/profiles/76561198092787248#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198062425416#!/compare/1564963200/1565136000

Sold with ~3 keys in sweets for FoD Zoomin

used there

Sale 12:

https://backpack.tf/profiles/76561198062425416#!/compare/1565136000/1565222400

https://backpack.tf/profiles/76561198106869848#!/compare/1565136000/1565222400

Sold for ~8.5 keys

Sale 13:

https://backpack.tf/profiles/76561198340634356#!/compare/1564272000/1564358400

https://backpack.tf/profiles/76561198116225537#!/compare/1563148800/1565481600

Bulk..?

Sale 14:

https://backpack.tf/profiles/76561198029074524#!/compare/1564185600/1564358400

https://backpack.tf/profiles/76561198151840025#!/compare/1559260800/1565222400

Untrace

Sale 15:

https://backpack.tf/profiles/76561198340634356#!/compare/1564272000/1564358400

https://backpack.tf/profiles/76561198335791307#!/compare/1564704000/1564790400

Utnrace

Sale 16:

https://backpack.tf/profiles/76561198335791307#!/compare/1566950400/1567036800

https://backpack.tf/profiles/76561198306809688#!/compare/1566345600/1567987200

Sold for 11 keys

Sale 17:

https://backpack.tf/profiles/76561198054270952#!/compare/1568678400/1568764800

https://backpack.tf/profiles/76561198153789411#!/compare/1568678400/1568764800

Sold for ~9 keys

Sale 18:

https://backpack.tf/profiles/76561198080672856#!/compare/1567468800/1568160000

https://backpack.tf/profiles/76561198454615761#!/compare/1568073600/1568160000

QS

sale 19:

https://backpack.tf/profiles/76561198454615761#!/compare/1568937600/1569024000

https://backpack.tf/profiles/76561198858693419#!/compare/1568937600/1569024000

Keys

Sale 20:

https://backpack.tf/profiles/76561198391438073#!/compare/1566000000/1566345600

https://backpack.tf/profiles/76561198340634356#!/compare/1566259200/1566345600

QS

sale 21:

https://backpack.tf/profiles/76561198340634356#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198293654690#!/compare/1566518400/1566950400

Sold for ~9.5 keys

Sale 22:

https://backpack.tf/profiles/76561198453055175#!/compare/1568592000/1568678400

https://backpack.tf/profiles/76561198305676157#!/compare/1568592000/1568678400

QS

sale 23:

https://backpack.tf/profiles/76561198057839982#!/compare/1565049600/1566086400

https://backpack.tf/profiles/76561198099357080#!/compare/1566172800/1566518400

SCM

Sale 24:

https://backpack.tf/profiles/76561198002757046#!/compare/1564790400/1564876800

https://backpack.tf/profiles/76561198027458189#!/compare/1564876800/1565049600

Sold for 9 keys

Sale 25:

https://backpack.tf/profiles/76561198050930436#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198363395191#!/compare/1566000000/1566086400

QS

sale 24:

https://backpack.tf/profiles/76561198363395191#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198342137721#!/compare/1566604800/1566691200

Keys

sale 25:

https://backpack.tf/profiles/76561198296727344#!/compare/1564704000/1564790400

https://backpack.tf/profiles/76561198377211368#!/compare/1552867200/1564790400

Transfer

Sale 26:

https://backpack.tf/profiles/76561198086071842#!/compare/1564185600/1564272000

https://backpack.tf/profiles/76561198267189538#!/compare/1564185600/1564272000

Bulk

Sale 27:

https://backpack.tf/profiles/76561198267189538#!/compare/1564790400/1564876800

https://backpack.tf/profiles/76561198054037654#!/compare/1564876800/1564963200

Sold or 8 keys

sale 28:

https://backpack.tf/profiles/76561198054037654#!/compare/1565308800/1565395200

https://backpack.tf/profiles/76561198063536945#!/compare/1565308800/1565395200

Untrace

Sale 29:

https://backpack.tf/profiles/76561198063536945#!/compare/1565568000/1565654400

https://backpack.tf/profiles/76561198287198615#!/compare/1565568000/1565654400

https://backpack.tf/profiles/76561198287198615#!/compare/1565654400/1565740800

https://backpack.tf/profiles/76561198878990119#!/compare/1565654400/1565740800

Untrace

Sale 30:

https://backpack.tf/profiles/76561198878990119#!/compare/1565827200/1566000000

https://backpack.tf/profiles/76561198971805272#!/compare/1565827200/1565913600

https://backpack.tf/profiles/76561198165527385#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198340634356#!/compare/1565827200/1565913600

Untrace / QS

Sale 31:

https://backpack.tf/profiles/76561198340634356#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198805103941#!/compare/1566604800/1566950400

Sold for ~9.5 keys

Sale 32:

https://backpack.tf/profiles/76561198805103941#!/compare/1567036800/1567814400

https://backpack.tf/profiles/76561198454615761#!/compare/1567728000/1567814400

QS

Sale 33:

https://backpack.tf/profiles/76561198082497772#!/compare/1563926400/1564012800

https://backpack.tf/profiles/76561198845919824#!/compare/1564099200/1564272000

SCM

Sale 34:

https://backpack.tf/profiles/76561198845919824#!/compare/1565222400/1565654400

https://backpack.tf/profiles/76561198104444235#!/compare/1564790400/1565654400

Untrace

Sale 35:

https://backpack.tf/profiles/76561198104444235#!/compare/1566950400/1567036800

https://backpack.tf/profiles/76561198083134207#!/compare/1566864000/1566950400

Bulk

Sale 36:

https://backpack.tf/profiles/76561198083134207#!/compare/1567814400/1567900800

https://backpack.tf/profiles/76561198409284313#!/compare/1567814400/1567900800

Sold for 10 keys

Sale 37:

https://backpack.tf/profiles/76561198188315303#!/compare/1567468800/1567728000

https://backpack.tf/profiles/76561198838447026#!/compare/1567641600/1567728000

QS

sale 38:

https://backpack.tf/profiles/76561198838447026#!/compare/1567728000/1567814400

https://backpack.tf/profiles/76561198110242198#!/compare/1562889600/1567814400

SCM

Sale 39:

https://backpack.tf/profiles/76561198110242198#!/compare/1567987200/1568419200

https://backpack.tf/profiles/76561198264853358#!/compare/1568332800/1568419200

Sold for Miami Geezer

use there

Sale 40:

https://backpack.tf/profiles/76561198264853358#!/compare/1568505600/1568937600

https://backpack.tf/profiles/76561198044684270#!/compare/1568851200/1568937600

Sold for 8 keys

sale 41:

https://backpack.tf/profiles/76561198189769813#!/compare/1568332800/1568592000

https://backpack.tf/profiles/76561198454615761#!/compare/1568246400/1568332800

QS

sale 42:

https://backpack.tf/profiles/76561198163034070#!/compare/1567814400/1568160000

https://backpack.tf/profiles/76561198080179568#!/compare/1567987200/1568073600

Sold for ~6.5 keys

sale 43:

https://backpack.tf/profiles/76561198123219305#!/compare/1565222400/1565654400

https://backpack.tf/profiles/76561198063536945#!/compare/1565568000/1565654400

https://backpack.tf/profiles/76561198063536945#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198870453692#!/compare/1565827200/1566000000

https://backpack.tf/profiles/76561198091342225#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198071326284#!/compare/1568160000/1568246400

Untrace

Sale 44:

https://backpack.tf/profiles/76561198367175771#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198308871838#!/compare/1565913600/1566000000

Sold for 7 keys

Sale 45:

https://backpack.tf/profiles/76561198308871838#!/compare/1566000000/1566172800

https://backpack.tf/profiles/76561198363395191#!/compare/1566086400/1566172800

Sold for ~7.5 keys

Sale 46:

https://backpack.tf/profiles/76561198363395191#!/compare/1566518400/1566604800

https://backpack.tf/profiles/76561198153735063#!/compare/1566518400/1566604800

Sold for 9 keys

Sale 47:

https://backpack.tf/profiles/76561198094964657#!/compare/1566259200/1566345600

https://backpack.tf/profiles/76561198334598690#!/compare/1566259200/1566345600

Sold for keys...

sale 48:

https://backpack.tf/profiles/76561198334598690#!/compare/1566691200/1566777600

https://backpack.tf/profiles/76561198133348135#!/compare/1565913600/1568160000

SCM(?)

Sale 49:

https://backpack.tf/profiles/76561198062797298#!/compare/1564531200/1565136000

https://backpack.tf/profiles/76561198309563748#!/compare/1564444800/1564704000

Bulk

sale 50:

https://backpack.tf/profiles/76561198309563748#!/compare/1564444800/1564704000

https://backpack.tf/profiles/76561198808823742#!/compare/1527552000/1564704000

https://backpack.tf/profiles/76561198141384533#!/compare/1564617600/1564790400

https://backpack.tf/profiles/76561198116000378#!/compare/1564704000/1564790400

https://backpack.tf/profiles/76561198116000378#!/compare/1564790400/1565827200

https://backpack.tf/profiles/76561198205939253#!/compare/1564704000/1564790400

https://backpack.tf/profiles/76561198125035818#!/compare/1564704000/1564790400

https://backpack.tf/profiles/76561198340634356#!/compare/1564704000/1564790400

Untrace

Sale 51:

https://backpack.tf/profiles/76561198340634356#!/compare/1565136000/1565222400

https://backpack.tf/profiles/76561198843408761#!/compare/1565136000/1565222400

Keys

sale 52:

https://backpack.tf/profiles/76561198843408761#!/compare/1565222400/1565308800

https://backpack.tf/profiles/76561198030214998#!/compare/1565222400/1565308800

https://backpack.tf/profiles/76561198334598690#!/compare/1565395200/1565568000

Untrace / QS

Sale 53:

https://backpack.tf/profiles/76561198334598690#!/compare/1566950400/1567036800

https://backpack.tf/profiles/76561198196708482#!/compare/1566864000/1567036800

Sold for 10 keys

Sale 54:

https://backpack.tf/profiles/76561198196708482#!/compare/1567296000/1567728000

https://backpack.tf/profiles/76561198201518699#!/compare/1567382400/1567468800

Untrtace

Sale 55 - 65:

https://marketplace.tf/items/tf2/30672;5;u3003

$17 / $1.80 = 9.44 keys

$12.1 / $1.80 = 6.72 keys

$16.5 / $1.82 = 9.07 keys <-- https://backpack.tf/item/4268857200

$17.12 / $1.84 = 9.30 keys

$17.32 / $1.84 = 9.41 keys <-- https://backpack.tf/item/4255195833

$17.32 / $1.81 = 9.57 keys

$17.5 / $1.83 = 9.56 keys

$12.15 / $1.82 = 6.68 keys

$17.89 / $1.82 = 9.83 keys <-- https://backpack.tf/item/6466563542

$18.8 / $1.82 = 10.33 keys <-- https://backpack.tf/item/4268857200

$12.2 / $1.80 = 6.78 keys

Bot.tf:

https://bot.tf/stats/item?def=30672&q=5&ef=Holy%20Grail&craft=1&aus=0&ks=0&source=browser_script

9 sales @ ~7.5 keys,

4 sales @ ~8.5 keys,

3 sales @ 9 keys,

3 sales @ ~9.5 keys,

4 sales @ 10 keys,

1 sale @ 11 keys,

1 sale @ 13 keys

Total sales @:

6.5 (x3)

7 (x2)

7.5 (x11)

8 (x2)

8.5 (x5)

9 (x9)

9.5 (x10)

10 (x8)

10.5

11 (x2)

13

gonna say i have enough sales to call item ones use there,

Buyers up to ~8.5 keys,

sellers down to 11 keys,

https://bot.tf/stats/listings/4EE08RQ2

K1ng's Part:

You are excluding 18 sales below 8.5 and just one above 11, so the range is not balanced.

7.5-10 or 7.5-11 should be fine. I know buyers are countering the low end now, but some of the 7.5 sales are recent and there are just too many to ignore.