https://backpack.tf/item/7957189643

Sale 1) Sold for 24 Keys

https://backpack.tf/profiles/76561198125904188#!/compare/1602633600/1602720000

Sale 2) ?

https://backpack.tf/profiles/76561198125904188#!/compare/1603670400/1604188800

Sale 3) Sold for 25 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1605571200/1605657600

Sale 4) Sold + 2 Keys for a Vivid Plasma Whoopee Cap (22.5 Keys)

https://backpack.tf/profiles/76561198100430869#!/compare/1606176000/1606262400

22.5 - 2 = 20.5, which rounds to 21 Keys

Sale 5) Sold for 21 Keys

https://backpack.tf/profiles/76561198240599376#!/compare/1606176000/1606262400

https://backpack.tf/profiles/76561198253109595#!/compare/1606176000/1606262400 - 14 were used for the Baker

https://backpack.tf/item/7956565555

Sale 6) Sold for 25 Keys

https://backpack.tf/profiles/76561198176593866#!/compare/1606348800/1606521600

Sale 7) Sold for 20 Keys + 19.77 Refined

https://backpack.tf/profiles/76561199015424556#!/compare/1607817600/1608422400

Low outlier.

https://backpack.tf/item/7956112364

Sale 8) Bulk sale

https://backpack.tf/profiles/76561198081123470#!/compare/1604361600/1604448000

Sale 9) Bulk sale

https://backpack.tf/profiles/76561198396499936#!/compare/1604620800/1604707200

https://backpack.tf/profiles/76561198300578059#!/compare/1604620800/1605484800

Sale 10) Sold for an Electrostatic Fruit Shoot + Strange Spec KS Iron Bomber (~3 Keys)

https://backpack.tf/profiles/76561198300578059#!/compare/1605484800/1606780800

Better to give the Fruit a low end.

Sale 11) Sold for a Circling Heart Tough Guy's Toque

https://backpack.tf/profiles/76561198429062799#!/compare/1606780800/1606867200

Better to drop the Toque.

Sale 12) Bulk sale

https://backpack.tf/profiles/76561199111354228#!/compare/1607731200/1607817600

21-25 should be fine