Sale 1: 33k

https://backpack.tf/profiles/76561197994697258#!/compare/1555200000/1555286400

https://backpack.tf/profiles/76561198086747482#!/compare/1555200000/1555286400

Twatt peak - 17k, at 50: https://backpack.tf/suggestion/5cf9136dd381727e40446f55

Sale 2: below buyers

https://backpack.tf/profiles/76561198343885717#!/compare/1554336000/1554422400

buncha tf2mart dumps in that history as well, none traceable

Sale 3: 37k

https://backpack.tf/profiles/76561198021055079#!/compare/1553212800/1553299200

More sales:

Sold for 33 Keys and ~2 Keys in Sweets(35 Keys total)

https://backpack.tf/profiles/76561198061275415#!/compare/1557100800/1557187200

Sold on Marketplace for:

$62(~34.4 Keys using 1.8 value, round down to 34)

$69.99(~39 Keys using 1.8 value)

$72 (caps at 37: https://imgur.com/a/NnLUKU7)

$40.99(~22.5 Keys using 1.82 value, low outlier)

https://marketplace.tf/items/984;5;u57

33-37