In the past 3 months there have been a total of 8 sales

(1) The most recent one is mine and I gave 61 keys in items, but was given 9 keys alongside the hat, which would make it 52 https://imgur.com/a/J4DVSVi

Also proof of effects https://backpack.tf/profiles/76561198337378097#!/compare/1596844800/1596931200

(2) Sales match, sold for about 31 keys;

https://backpack.tf/profiles/76561198102298597#!/compare/1596499200/1596585600 ( buyer)

https://backpack.tf/profiles/76561198002391950#!/compare/1596412800/1596585600 (seller)

(3) We could say 19 keys right? A little low so we can discard this sell https://backpack.tf/profiles/76561198282873040#!/compare/1596412800/1596499200

(4) Untraceable https://backpack.tf/profiles/76561198282873040#!/compare/1594684800/1595462400

https://backpack.tf/profiles/76561198219902779#!/compare/1594684800/1596240000

(5) Another untraceable sell

https://backpack.tf/profiles/76561198323733331#!/compare/1594598400/1594684800

https://backpack.tf/profiles/76561198219902779#!/compare/1594598400/1594684800

(6) Bulk trade, sale unusable

https://backpack.tf/profiles/76561198054198170#!/compare/1592438400/1592870400

(7). Another unusable bulk trade

https://backpack.tf/profiles/76561198017911489#!/compare/1590796800/1590883200

(8). Sold for 27, but that's under the price https://backpack.tf/profiles/76561198084164485#!/compare/1590192000/1590364800

Sells with 19 and 27 won't be used because current buy orders (28) exceed both. And 31 won't be used because it was a quicksell, sold within 3 hours.

Most sales are untraceable or unusable, so 52 is the value I'm going for.