Helping.

SALE 1: Sold for 18 keys

https://backpack.tf/profiles/76561198016339526#!/compare/1567382400/1567555200

https://backpack.tf/profiles/76561198968951028#!/compare/1567123200/1567555200

SALE 2: Sold for stormy storm jeepcap

https://backpack.tf/profiles/76561198085615710#!/compare/1564272000/1567296000

https://backpack.tf/profiles/76561198021055079#!/compare/1567209600/1567296000

Seems low, as the jeepcap has unsolds at 14.

SALE 3: Sold for 19 keys

https://backpack.tf/profiles/76561198305494036#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198271521289#!/compare/1564963200/1565136000

SALE 4: Seems like a sale for keys, not sure how many though.

https://backpack.tf/profiles/76561198271521289#!/compare/1566777600/1566864000

https://backpack.tf/profiles/76561198848059175#!/compare/1566777600/1566864000

SALE 5: Sold for max head

https://backpack.tf/profiles/76561198086948995#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561198134058742#!/compare/1567900800/1568419200

21.3 rounding to 21 keys

Buyout was also 21 keys

https://bot.tf/stats/listings/MQ9Q30E0

SALE 6: Looks like 15 keys

https://backpack.tf/profiles/76561198067540283#!/compare/1517875200/1567209600

https://backpack.tf/profiles/76561198096216172#!/compare/1566604800/1567468800

Histories dont match though.

CLASSIFIEDS

https://gyazo.com/5152df09ffec5495613587bc0df6169a

Sales at 18, 19, and 21.

Taking 18-21 keys.