Resuggestion, thx to people I'll mention when I show their help

History 1: https://backpack.tf/item/9443206890

25 keys:

https://backpack.tf/profiles/76561198179707937#!/compare/1611705600/1611792000

https://backpack.tf/profiles/76561198295407783#!/compare/1611705600/1612224000

History 2: https://backpack.tf/item/9312461078

Untraceable:

https://backpack.tf/profiles/76561198046353418#!/compare/1604966400/1605052800

https://backpack.tf/profiles/76561198349848918#!/compare/1604966400/1605052800

tradebacks

17 keys match:

https://backpack.tf/profiles/76561198349848918#!/compare/1605916800/1606089600

https://backpack.tf/profiles/76561198091502579#!/compare/1606003200/1606089600

It was then sold for 24 keys:

(Credit to Erik for the screenshot) https://imgur.com/4LvhJAT

History 3: https://backpack.tf/item/9308657637

Untraceable:

https://backpack.tf/profiles/76561198110668453#!/compare/1609459200/1611273600

https://backpack.tf/profiles/76561198110668453#!/compare/1609459200/1611273600

Untraceable, nothing matches:

https://backpack.tf/profiles/76561198123789684#!/compare/1611360000/1611446400

https://backpack.tf/profiles/76561198075552138#!/compare/1610928000/1611792000

History 4: https://backpack.tf/item/9291646929

Untraceable:

https://backpack.tf/profiles/76561198826254247#!/compare/1605225600/1605312000

https://backpack.tf/profiles/76561198119609877#!/compare/1605312000/1605398400

Untraceable:

https://backpack.tf/profiles/76561198119609877#!/compare/1605571200/1605657600

https://backpack.tf/profiles/76561197962050179#!/compare/1605657600/1605830400

Tradebacks from Scrap.tf user storage

(Credit to Vincentius)

sold within 3 hours listed for 30 keys

https://gyazo.com/0b5a7cc88b770aa4d45f0a84004c81cf

paid 14

https://gyazo.com/af2c7c8854f26dcdb5c5a31fa6460076

From Xergoyf:

"https://backpack.tf/profiles/76561198034911502#!/compare/1567382400/1610409600 - highway was qsed for pure.

17 sold in 1 day, so I don't think that should be used as the low-end."

Sales at 14, 17, 24, 25, 30.

Given the buyers up to 15-17 keys and the fact 17 sold really fast, 14-17 looks low here. Going with 24-30