Thanks to Chman for sending me screenshots and for the suggestion!

Item 1: https://backpack.tf/item/2032142873

Sale 1: 975k pure, buyer's outbound doesn't have full sale value, screenshot attached below

https://backpack.tf/profiles/76561198129175457#!/compare/1755475200/1757894400

https://backpack.tf/profiles/76561198840987606#!/compare/1757808000/1757894400

Screenshot from buyer: https://imgur.com/a/4MEnBke

Sale 2: Sold 1:1 for a Head of Steam Lucky Cat Hat, buyer's compare shows 1025k from Sale 3 inbound, seller's inbound shows both hats

https://backpack.tf/profiles/76561198406138209#!/compare/1758153600/1758240000

https://backpack.tf/profiles/76561198840987606#!/compare/1758067200/1758153600

Sale 3: Sells same-day as Sale 2 for 1025k pure

https://backpack.tf/profiles/76561198406138209#!/compare/1758240000/1758153600

https://backpack.tf/profiles/76561198115841780#!/compare/1758153600/1758240000

Screenshot from seller: https://imgur.com/a/AYNQgtm

Sales at 975k and 1025k, taking these two values for the range.