Major credits to Blaze.xTH3RM4Lx for this one

Sale 1: https://backpack.tf/item/567058440

https://backpack.tf/profiles/76561198032789419#!/compare/1656288000/1656374400

https://backpack.tf/profiles/76561198265567063#!/compare/1656288000/1656374400

https://i.imgur.com/ru4cnrD.png - 246 pure

Sale 2:

https://backpack.tf/item/10229978547

https://marketplace.tf/items/tf2/631;5;u17 - sold for $399 (211 keys)

Sales 3 + 4:

https://backpack.tf/item/9931168906

https://mannco.store/item/440-sunbeams-unusual-hat-with-no-name - sold for $430.99 (251 keys), $360 (206 keys)

Sale 5:

https://backpack.tf/item/5670584401

https://backpack.tf/profiles/76561198007139482#!/compare/1659398400/1659571200

https://backpack.tf/profiles/76561198081300840#!/compare/1659484800/1659657600 - sold for 208 keys + 2 Non-Craftable An Extraordinary Abundance of Tinge = 212 keys

Sale 6:

https://backpack.tf/item/5670584401

https://backpack.tf/profiles/76561198265567063#!/compare/1658880000/1659484800

https://backpack.tf/profiles/76561198007139482#!/compare/1658102400/1659225600 - sold for Purple Energy Killer's Kabuto + 10 keys

Mini for the PE buto:

https://backpack.tf/profiles/76561198301712433#!/compare/1657497600/1657584000

https://backpack.tf/profiles/76561198012715788#!/compare/1657497600/1657584000 - traded for c. bubble dr's dapper topper (in date at 108.5) + 42 pure - total 160 keys

^ Above sale comes out to 170 total, and buy orders are at 187, so excluding this one as low.

Summary:

170 (excluded)

206

211

212

246

251

Taking 205-250.