Resugg, thanks to Jarool, Glen, and K1ng for info.

I like frost.

What a gentleman.

Seller at 55

Sale 1: 36 Pure (Confirmed by Jarool in previous sugg)

https://backpack.tf/profiles/76561198253494628#!/compare/1520208000/1529539200

Sale 2: 50 Pure (Confirmed by Jarool in previous sugg)

https://backpack.tf/profiles/76561198122995945#!/compare/1529452800/1529539200

Sale 3: 39 Pure

https://backpack.tf/profiles/76561198122995945#!/compare/1531267200/1531612800

https://backpack.tf/profiles/76561198122604075#!/compare/1531180800/1531267200

Sale 4: 45 Pure (Executioner was sold to scrap for the rest of the keys)

https://backpack.tf/profiles/76561198122604075#!/compare/1531526400/1531612800

https://backpack.tf/profiles/76561198032016356#!/compare/1531526400/1531612800

Confirmation of sales 3 and 4: https://imgur.com/a/0newQkh

Sales are 36, 39, 45, 50

Gonna call 36 an outlier as it was a QS around the buy order price.

Taking 39-50