Classies at the time of suggesting https://prnt.sc/pscj34

Marketplace sales https://marketplace.tf/items/tf2/152;5;u62

2x56 / 1.81 = 31 keys (2)

1x60 / 1.82 = 33 keys

Sale 1. https://backpack.tf/profiles/76561198250719556#!/compare/1570924800/1571011200

https://backpack.tf/profiles/76561198171962935#!/compare/1570838400/1570924800 Aussie RL? Histories don't match, excluding

Sale 2. https://backpack.tf/profiles/76561198119405640#!/compare/1571184000/1571270400 Low

Sale 3. https://backpack.tf/profiles/76561198106511423#!/compare/1571270400/1571356800 With 2 keys for a Beams Field Practice. High but better use on the practice anyways

Sale 4. https://backpack.tf/profiles/76561198114402400#!/compare/1570924800/1571097600 Bulk

Sale 5. Histories don't match https://backpack.tf/profiles/76561198060762245#!/compare/1572739200/1572825600

Sale 6. https://backpack.tf/profiles/76561198113899098#!/compare/1572480000/1572566400

https://backpack.tf/profiles/76561198348845919#!/compare/1572480000/1572566400

24 pure

= 24 keys

Sale 7. https://backpack.tf/profiles/76561198060762245#!/compare/1572739200/1572825600

23 pure

= 23 keys

Sales: 23, 24, 31, 31, 33

Sales support each other, unsolds are a bit higher than highest sale, rolling with 23-33!