Cowboy does a cowboy hat suggestion (part 2).

Item 1: https://backpack.tf/item/15228620937

Sale 1: Untrace

https://backpack.tf/profiles/76561199017959799#!/compare/1751587200/1751846400

https://backpack.tf/profiles/76561198845761172#!/compare/1751068800/1751932800

Sale 2: Untrace

https://backpack.tf/profiles/76561198263112666#!/compare/1751673600/1751846400

https://backpack.tf/profiles/76561198845761172#!/compare/1751068800/1751846400

Item 2: https://backpack.tf/item/15233699084

Sale 1: Untrace

https://backpack.tf/profiles/76561199581722058#!/compare/1753747200/1753833600

https://backpack.tf/profiles/76561198254660352#!/compare/1753920000/1754352000

Item 3: https://backpack.tf/item/15351654800

Sale 1: Untrace

https://backpack.tf/profiles/76561198135388328#!/compare/1754092800/1754179200

https://backpack.tf/profiles/76561199474152483#!/compare/1752105600/1754784000

Sale 2: Untrace

https://backpack.tf/profiles/76561199474152483#!/compare/1756598400/1757635200

https://backpack.tf/profiles/76561198135388328#!/compare/1756598400/1757635200

Sale 3: Untrace

https://backpack.tf/profiles/76561198135388328#!/compare/1756684800/1756771200

https://backpack.tf/profiles/76561198226525604#!/compare/1756944000/1757030400

Sale 4: 30k pure

https://backpack.tf/profiles/76561198226525604#!/compare/1757030400/1757116800

https://backpack.tf/profiles/76561197971003538#!/compare/1757030400/1757116800

Item 4: https://backpack.tf/item/15291856081

Sale 1: Untrace, never shows up in seller's inv

https://backpack.tf/profiles/76561199013653880#!/compare/1752105600/1752192000

Item 5: https://backpack.tf/item/15910307702

Sale 1: Untrace

https://backpack.tf/profiles/76561198338666127#!/compare/1754611200/1754956800

https://backpack.tf/profiles/76561198935892417#!/compare/1753833600/1755043200

Item 6: https://backpack.tf/item/15493814571

Sale 1: BP buyout, put on marketplace

https://backpack.tf/profiles/76561198839782061#!/compare/1754092800/1755129600

https://backpack.tf/profiles/76561198244962432#!/compare/1754006400/1754092800

Item 7: https://backpack.tf/item/15446565482

Sale 1: Untrace

https://backpack.tf/profiles/76561198983856237#!/compare/1754179200/1754265600

https://backpack.tf/profiles/76561198316831771#!/compare/1754179200/1754265600

Item 8: https://backpack.tf/item/15364476140

Sale 1: Bulk

https://backpack.tf/profiles/76561198983856237#!/compare/1750896000/1750982400

https://backpack.tf/profiles/76561199046064612#!/compare/1750636800/1750982400

Sale 2: 27k pure, the 27k sale key at the top of seller's has keys coming from Unusual! :D / Unusual 4.0, and given that none of the outgoing keys share a history on buyer's side, but he did dump a Sylicone Succiduous Airdog and a Celestial Summit Airdog to Unusual 4.0, and a Steaming Flash of Inspiration to Unusual! :D, we can infer he used these to buy them. All dumped items with matching histories are linked below as supplementary proof.

https://backpack.tf/profiles/76561198836967499#!/compare/1754438400/1754524800

https://backpack.tf/profiles/76561199046064612#!/compare/1754438400/1754524800

https://backpack.tf/item/13759381755

https://backpack.tf/item/13316029532

https://backpack.tf/item/5791999089

Item 9: https://backpack.tf/item/15234447652

Sale 1: 22k (Thank you Mindacos)

https://backpack.tf/profiles/76561197971877996#!/compare/1760918400/1761091200

Item 10: https://backpack.tf/item/15438235156

Sale 1: Likely incomplete, only 14 keys show in compare (Thank you Mindacos)

https://backpack.tf/profiles/76561199581722058#!/compare/1759622400/1759708800

https://backpack.tf/profiles/76561199006679800#!/compare/1759622400/1759708800

Marketplace sales:

https://marketplace.tf/items/tf2/31514;5;u364

https://marketplace.tf/items/tf2/5021;6

$49.95, Jul 7th, key price for the day is $2.02, $49.95 / $2.02 = 24.72k

Classifieds link (9/16): https://imgur.com/a/eUJeKju

Classifieds link (11/11): https://imgur.com/a/dUzqr2u

Sales at 22, 24.72, 27, and 30 keys. Excluding the sale at 22 keys as a buyer dump, and now reincluding the sale at 24.72k, as buyers have dipped back below it. Taking 24 keys for the low end, and 30 keys as the high end.