Update!

Okay, okay, suggesting... need to do some!

Sale 1: https://backpack.tf/profiles/76561198316071886#!/compare/1647734400/1647820800

https://backpack.tf/profiles/76561198096860013#!/compare/1647820800/1647907200

46 pure + Max's

46 + ~30 = 76, buyout was 75

Sale 2: https://backpack.tf/profiles/76561198453530349#!/compare/1642636800/1642723200

https://backpack.tf/profiles/76561198316071886#!/compare/1642636800/1642723200

57 pure

Sale 3: https://backpack.tf/profiles/76561199125443371#!/compare/1645574400/1645660800

https://backpack.tf/profiles/76561198057317770#!/compare/1645574400/1645660800

40 match, something was bought with rest of the keys, but can't be sure

Sale 4: https://backpack.tf/profiles/76561198057317770#!/compare/1646697600/1646784000

https://backpack.tf/profiles/76561198114402400#!/compare/1646697600/1646784000

Use there.

Additional by the King:

Who insinuated anything countering actually. You excluded 57 without even mentioning why, I just had to guess.

Sales in this history link: https://backpack.tf/item/7312090690

Sold for 75 keys

https://backpack.tf/profiles/76561199187383421#!/compare/1641600000/1641686400

Dumped to Scrapyard for ~49:

https://backpack.tf/profiles/76561198115572261#!/compare/1642636800/1643587200

https://backpack.tf/profiles/76561198453530349#!/compare/1642550400/1642636800

https://gladiator.tf/listings/61eaa2e6bdbe0716d3035c95

Scrapyard resold for (pretty sure) 59, not 57 (your sale 2).

https://gladiator.tf/listings/61ead5403b500ac7b505bd5c

Then sold again for 75 (your sale 1).

Sales in this history: https://backpack.tf/item/7283408026

Not sure about your sale 3 but it had a B/O of 77:

https://gladiator.tf/listings/6216de75e16109758f306ec8

And about your sale 4: it then resold with ~9 keys in sweets for a Smoking Crone's

https://backpack.tf/item/9279212265

Crone's is currently listed at 69, so the Tundra would be 60 at best.

So sales at 49, 59, <60, 75, 75, 77(?). This needs a range.

Classies: https://i.imgur.com/qLeQnmm.png. 60-75!