Re-suggesting.

Sales 1 & 2:

Sold for $27.90 & $21 on marketplace.tf

https://marketplace.tf/items/30767;5;u11

https://manic.tf/keyprice/?at=2018-10-06 - $21 / $1.81 = 11.60 keys

https://manic.tf/keyprice/?at=2018-10-18 - $27.9 / $1.76 = 15.85 keys

X = 16

X = 12

Sale 3:

Sold for 11 keys + ToD Ticket

Seller: https://backpack.tf/profiles/76561198065316185#!/compare/1539216000/1539302400

Buyer: https://backpack.tf/profiles/76561198229732576#!/compare/1539043200/1539302400

https://backpack.tf/item/4948754162

X = 11

Sale 4:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198814345631#!/compare/1537660800/1537920000

Buyer: https://backpack.tf/profiles/76561198065316185#!/compare/1537833600/1537920000

https://backpack.tf/item/4948754162

X = 11

Sale 5:

Bought from scrap for 10 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1538006400/1538092800

Buyer: https://backpack.tf/profiles/76561198132127299#!/compare/1537574400/1538092800

https://backpack.tf/item/4819833948

X = 11

Sale 6:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198132127299#!/compare/1538265600/1538352000

Buyer: https://backpack.tf/profiles/76561198151746084#!/compare/1538265600/1538352000

https://backpack.tf/item/4819833948

X = 11

Sale 7:

Sold for 11 keys + some metal

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1539907200/1539993600

Buyer: https://backpack.tf/profiles/76561198425703405#!/compare/1539648000/1540080000

https://backpack.tf/item/5750447349

X = 11

Sale 8:

Bought from scrap for 10 keys + 6.77 ref

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1538092800/1538179200

Buyer: https://backpack.tf/profiles/76561198146307127#!/compare/1538092800/1538179200

https://backpack.tf/item/5938003851

X = 10

Sale 9:

Sold to scrap for 10 keys + small amount of metal

Seller: https://backpack.tf/profiles/76561198401509004#!/compare/1536624000/1536710400

Buyer: https://backpack.tf/profiles/76561198135388328#!/compare/1536624000/1536710400

https://backpack.tf/item/7010603527

X = 10

Sale 10:

Sold to a quickbuyer for 10 keys

Seller: https://backpack.tf/profiles/76561198352937730#!/compare/1537660800/1537747200

Buyer: https://backpack.tf/profiles/76561198814345631#!/compare/1537574400/1537660800

https://backpack.tf/item/4948754162

X = 10

Sale 11:

Sold to scrap for ~10 keys

Seller: https://backpack.tf/profiles/76561198195234518#!/compare/1538092800/1539043200

Buyer: https://backpack.tf/profiles/76561198135388328#!/compare/1538006400/1538092800

https://backpack.tf/item/4819833948

X = 10

Other Sales:

https://backpack.tf/item/7010603527 (#1-3)

https://backpack.tf/item/6985492497 (#4)

https://backpack.tf/item/5995646580 (#5-7)

https://backpack.tf/item/5938003851 (#8 & #9)

https://backpack.tf/item/5938003851 (#10-13)

https://backpack.tf/item/5697259243 (#14 & #15)

https://backpack.tf/item/4948754162 (#16)

https://backpack.tf/item/4819833948 (#17-21)

#1

Untraceable, bought from scrap

https://backpack.tf/profiles/76561198135388328#!/compare/1536710400/1536796800

https://backpack.tf/profiles/76561198057468576#!/compare/1536710400/1536796800

#2

Untraceable, dumped on scrap

https://backpack.tf/profiles/76561198057468576#!/compare/1537574400/1537747200

https://backpack.tf/profiles/76561198135388328#!/compare/1537574400/1537660800

#3

Untraceable, bought from scrap then sold on SCM

https://backpack.tf/profiles/76561198135388328#!/compare/1537574400/1537660800

https://backpack.tf/profiles/76561198295605885#!/compare/1535846400/1538352000

#4

Untraceable

https://backpack.tf/profiles/76561198337734785#!/compare/1537833600/1537920000

https://backpack.tf/profiles/76561198416156493#!/compare/1537833600/1537920000

#5

Untraceable, dumped on scrap

https://backpack.tf/profiles/76561198337734785#!/compare/1538179200/1538265600

https://backpack.tf/profiles/76561198135388328#!/compare/1538179200/1538265600

#6

Untraceable

https://backpack.tf/profiles/76561198135388328#!/compare/1538179200/1538265600

https://backpack.tf/profiles/76561198356834968#!/compare/1538179200/1538265600

#7

Untraceable, probably bulk

https://backpack.tf/profiles/76561198356834968#!/compare/1538265600/1538352000

https://backpack.tf/profiles/76561198197841087#!/compare/1538265600/1538352000

#8

Untraceable

https://backpack.tf/profiles/76561198306014701#!/compare/1538092800/1538438400

https://backpack.tf/profiles/76561198135388328#!/compare/1538092800/1538179200

#9

Bulk for the max’s?

https://backpack.tf/profiles/76561198146307127#!/compare/1538179200/1538265600

https://backpack.tf/profiles/76561198162503740#!/compare/1538179200/1538265600

#10

Untraceable, sold to scrap

https://backpack.tf/profiles/76561198162503740#!/compare/1538265600/1538352000

https://backpack.tf/profiles/76561198135388328#!/compare/1538265600/1538352000

#11

Scrap purchase involving a Blizzardy Boron Beanie

https://backpack.tf/profiles/76561198135388328#!/compare/1538524800/1538611200

https://backpack.tf/profiles/76561198161385078#!/compare/1538611200/1538697600

Better to not use this sale when we have other pure sales to work with already.

#12

Bulk-ish for Blizzardy Drill Hat

https://backpack.tf/profiles/76561198161385078#!/compare/1538870400/1538956800

https://backpack.tf/profiles/76561198290278262#!/compare/1538006400/1538956800

#13

Possible sale at 11 keys

https://backpack.tf/profiles/76561198290278262 - backpacks currently not updating

https://backpack.tf/profiles/76561198329274183#!/compare/1539388800/1539820800

#14

Probably bulk for pure

https://backpack.tf/profiles/76561198049149130#!/compare/1538697600/1538870400

https://backpack.tf/profiles/76561198032176942#!/compare/1538697600/1538784000

#15

Untraceable

https://backpack.tf/profiles/76561198032176942#!/compare/1538784000/1538870400

https://backpack.tf/profiles/76561198064340979#!/compare/1519430400/1539820800

Pretty sure this is the $27.90 sale on marketplace

#16

Untraceable

https://backpack.tf/profiles/76561198229732576#!/compare/1539302400/1539561600

https://backpack.tf/profiles/76561198337734785#!/compare/1539302400/1539388800

#17

Sold for Smoking Otolaryngologist’s Mirror + ~2 keys in pure/items

https://backpack.tf/profiles/76561198151746084#!/compare/1538265600/1538352000

https://backpack.tf/profiles/76561198269183178#!/compare/1538265600/1538352000

Would fit in the range given the seller on the Mirror currently - https://i.imgur.com/MYIlU9m.png

#18

Sold for Strange Spec. KS C.A.P.P.E.R (~7) + a key

https://backpack.tf/profiles/76561198269183178#!/compare/1539043200/1539388800

https://backpack.tf/profiles/76561198351184262#!/compare/1539129600/1539388800

Low, excluding.

#19

Untraceable

https://backpack.tf/profiles/76561198351184262#!/compare/1539388800/1539475200

https://backpack.tf/profiles/76561198280357510#!/compare/1539388800/1539475200

#20

Untraceable, sold to scrap

https://backpack.tf/profiles/76561198280357510#!/compare/1539388800/1539475200

https://backpack.tf/profiles/76561198135388328#!/compare/1539388800/1539475200

#21

Untraceable, bought from scrap

https://backpack.tf/profiles/76561198135388328#!/compare/1539388800/1539475200

https://backpack.tf/profiles/76561198177038371#!/compare/1539475200/1539561600

Sellers:

https://i.imgur.com/8XpO1GN.png

https://backpack.tf/item/4948754162 - ~11.38 keys

https://backpack.tf/item/5995646580 - ~11.38 keys

https://backpack.tf/item/5007854201 - 15 keys

Sales at:

10 (4x)

11 (5x)

12

16

https://backpack.tf/suggestion/5bcafeb744325a6146170534#comment-5bccc99dcf6c75411d6a62ba - Several sales at 12 & 13 from the last suggestion, using them as the high-end, as per K1ng’s request.

Going with 10-13.