This took sooooooo long.

https://backpack.tf/item/361684747

https://backpack.tf/item/669045704

https://backpack.tf/item/418561967 (Duped)

https://backpack.tf/item/362101553

https://backpack.tf/item/242539911

https://backpack.tf/item/269883273

Sale 1. https://backpack.tf/profiles/76561198340736289#!/compare/1529884800/1530057600

26 pure

= 26 keys

Sale 2. https://backpack.tf/profiles/76561198126693824#!/compare/1531872000/1531958400

https://backpack.tf/profiles/76561198238480464#!/compare/1531872000/1531958400

Sold for a DBD Aviator (29)

= 29 keys

Sale 3. https://backpack.tf/profiles/76561198119149660#!/compare/1531872000/1531958400

24 pure + ~1 key sweets

= 25 keys

Sale 4. https://backpack.tf/profiles/76561198340736289#!/compare/1529712000/1529884800

Searing Aviators? Histories don't match, would have been high outlier anyways

Sale 5. https://backpack.tf/profiles/76561198836204190#!/compare/1529798400/1529884800

Sold for a T. Wayy Well Wrapped hat

Wrapped Hat is outdated badly, better use there

Sale 6. https://backpack.tf/profiles/76561198109986831#!/compare/1525478400/1525564800

28 pure

=28 keys

Sale 7. https://backpack.tf/profiles/76561198135138603#!/compare/1525910400/1525996800

25 pure

= 25 keys

Sale 8. https://backpack.tf/profiles/76561198369352441#!/compare/1531353600/1531440000

28 pure

= 28 keys

Sale 9. https://backpack.tf/profiles/76561198055721127#!/compare/1528675200/1528761600

No idea. Gunslinger history doesn't match and was confirmed to have sold for 30 pure in a separate trade

Sale 10. https://backpack.tf/profiles/76561197996095002#!/compare/1525824000/1525910400

Sold with 4 keys for a Neutron Star Lil Bitey (35)

= 35 keys

Sale 11. https://backpack.tf/profiles/76561197996095002#!/compare/1525910400/1525996800

D@D Tough Guy's Toque (30) + ~1 key in items

= 31

Sale 12. https://backpack.tf/profiles/76561198130781059#!/compare/1528934400/1529107200

Almost 50 keys in bulk items

= High outlier

Sale 13. https://backpack.tf/profiles/76561198057892449#!/compare/1528934400/1531872000

Cash? No idea

Final: 26, 29, 25, 28, 25, 28, 35, 31 (25 sales countered by buyers and 26 is too close. Counting 35 as an outlier, excluding)

Rolling with 28-31

Toque mini: https://backpack.tf/profiles/76561198314695066#!/compare/1527120000/1527206400

= 30 keys

Bitey mini: https://backpack.tf/profiles/76561198376488914#!/compare/1532304000/1532390400

35 pure

= 35 keys