Credit to DedAndrei and Lemons: https://backpack.tf/suggestion/669507dd1538b866fb0ad37c

DedAndrei:

Sale 1)

https://prnt.sc/-juWm82VVTps 320 keys

seller : https://backpack.tf/profiles/76561198125791160#!/compare/1720915200/1721001600

buyer : https://backpack.tf/profiles/76561198253570951#!/compare/1720828800/1721001600

Lemons:

Sale 2)

https://backpack.tf/profiles/76561198404690943#!/compare/1721174400/1721260800

https://backpack.tf/profiles/76561198065830103#!/compare/1721174400/1721260800 - Sold for a Death at Dusk Desert Marauder (212.5) + a Strange Professional Killstreak Black Dahlia Pistol (Factory New) (instantly sold for 37.5 keys) = 250 keys

Sale 3)

https://backpack.tf/profiles/76561198253570951#!/compare/1721088000/1721174400

https://backpack.tf/profiles/76561198404690943#!/compare/1721088000/1721174400 - Untraced

This wasn't actually untraced. This was actually me doing a spycrab on vatican city as a proxy for skinwalker, he gave me his scorching flames hustler's halmark against behr's sunbeams warpig. It didn't track to my backpack since the crab went very fast. I won it 2-3 and then I gave the winnings to skinwalker. Either way we can just call it as a gamble by proxy.

Going with a range of 250 - 320 keys or an average of 285 Keys flat.