Given recent suggestion, gonna take sales form Aug 18 on.

Sale 1:

https://backpack.tf/profiles/76561198432623475#!/compare/1566518400/1566604800

https://backpack.tf/profiles/76561198086948995#!/compare/1566518400/1566604800

Sold with ~17 keys in sweets for CPS Cannonball

use there

https://bot.tf/stats/listings/Y9GL7896

B/O of 18 keys

Sale 2:

https://backpack.tf/profiles/76561198872803862#!/compare/1566864000/1567468800

https://backpack.tf/profiles/76561198131633162#!/compare/1567382400/1567468800

Untrace

Sale 3:

https://backpack.tf/profiles/76561198153455640#!/compare/1566000000/1566518400

https://backpack.tf/profiles/76561198817510262#!/compare/1566432000/1566691200

QS

Sale 4:

https://backpack.tf/profiles/76561198360147278#!/compare/1565827200/1565913600

https://backpack.tf/profiles/76561198125791160#!/compare/1565827200/1565913600

Bulk

Sale 5:

https://backpack.tf/profiles/76561198084062882#!/compare/1565913600/1566086400

https://backpack.tf/profiles/76561198138735898#!/compare/1566000000/1566086400

Sold for Clocked Samur-Eye

use there

Sale 6:

https://backpack.tf/profiles/76561198138735898#!/compare/1566345600/1566691200

https://backpack.tf/profiles/76561198802465612#!/compare/1566518400/1566604800

Keys, likely

Sale 7:

https://backpack.tf/profiles/76561198352778035#!/compare/1567209600/1567296000

https://backpack.tf/profiles/76561198432623475#!/compare/1567123200/1567296000

Sold for 10 keys

Sale 8:

https://backpack.tf/profiles/76561198432623475#!/compare/1567814400/1567987200

https://backpack.tf/profiles/76561198337734785#!/compare/1567728000/1567814400

Sold for ~9 keys

Sale 9:

https://backpack.tf/profiles/76561198861157494#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198111977118#!/compare/1565654400/1566000000

Untrace, likely keys?

sale 10:

https://backpack.tf/profiles/76561198111977118#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198802360768#!/compare/1566000000/1566086400

Sold for SGG Breakdance + ~11 keys in sweets

Break Mini:

https://backpack.tf/suggestion/5d7df73dd3817219f126630d

Suggestion for ~3.5 keys

Total is 14.5 keys

Sale 11:

https://backpack.tf/profiles/76561198802360768#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198431421139#!/compare/1566604800/1566691200

Sold for Aussie Black Box(~11)

https://bot.tf/stats/listings/M17NPZX1

B/O of 20 keys

Sale 12:

https://backpack.tf/profiles/76561198156733777#!/compare/1568073600/1568160000

https://backpack.tf/profiles/76561198973894950#!/compare/1567987200/1568073600

https://backpack.tf/profiles/76561198950621219#!/compare/1568073600/1568160000

https://backpack.tf/profiles/76561198089253101#!/compare/1568073600/1568160000

Untrace

Sale 13 - 16:

https://marketplace.tf/items/tf2/30182;5;u62

$25 / $1.82 = 13.74 keys <-- https://backpack.tf/item/7957401305

$22 / $1.82 = 12.09 keys

$25 / $1.81 = 13.81 keys <-- https://backpack.tf/item/7957509154 | https://bot.tf/stats/listings/MVRP02J6 B/O of ~14 keys

$33.11 / 1.82 = 18.19 keys

Total sales @:

9, 10, 11, 12, 14, 14, 14.5, 18 keys

Sellers down to 13 keys,

buyers up to ~9 keys

gonna call 9, 10 low,

18 high,

taking 11 - 15 keys, conserving most sales around unsolds.