Sale #1:

https://backpack.tf/item/15677568118 ~ scammers, ignoring

Sale #2:

https://backpack.tf/item/15421916009

https://backpack.tf/profiles/76561199108309959#!/compare/1743465600/1743552000 ~ ? no matches

https://backpack.tf/profiles/76561198086011812#!/compare/1742774400/1743638400 ~ maybe its his bot?

Sale #3:

https://backpack.tf/item/15130368003

https://backpack.tf/profiles/76561199124175531#!/compare/1748822400/1750032000 ~ using on Phantom Plague Witch Doctor as most of the sales for that hat are gamba / red line

https://backpack.tf/profiles/76561198050023352#!/compare/1749945600/1750118400

Sale #4:

https://backpack.tf/item/15005739389

https://backpack.tf/profiles/76561199094817026#!/compare/1747958400/1748044800 ~ 13 keys pure

https://backpack.tf/profiles/76561198117597416#!/compare/1747872000/1748044800

Sale #5, 6, 7, 8:

https://backpack.tf/item/14998586581

https://marketplace.tf/items/tf2/31475;5;u360

April 26 $37.99 / 1.93 = 19.68 keys

May 9 $37.99 / 1.93 = 19.68 keys

May 26 $37.99 / 1.94 = 19.58 keys

June 22 $37.99 / 1.98 = 19.18 keys

Sale #9:

https://backpack.tf/item/15006878522

https://backpack.tf/profiles/76561198128276213#!/compare/1750723200/1750809600 ~ bulk for a sunbeams topper

https://backpack.tf/profiles/76561198269047783#!/compare/1750723200/1750809600

Sale #10:

https://backpack.tf/profiles/76561198113466974#!/compare/1748908800/1749600000 ~ history hasnt loaded

https://backpack.tf/profiles/76561198128276213#!/compare/1750032000/1750118400 ~ Wicked Wood Skullbrero? The buyers themselves would be way higher than the other sales

Sale #11:

https://backpack.tf/item/15020155655

https://backpack.tf/profiles/76561198837379064#!/compare/1746748800/1747180800 ~ 1 key matches

https://backpack.tf/profiles/76561198164911027#!/compare/1746144000/1747008000 ~ 15 keys

Sale #12:

https://backpack.tf/profiles/76561199084784906#!/compare/1745366400/1745452800 ~ 16 keys match using nearID

https://backpack.tf/profiles/76561198837379064#!/compare/1745107200/1745452800

Sales @ 13, 15, 16, 20, 20, 20, 19

13 is below buyers so taking 15-20.