Let's update it (resuggesting from https://backpack.tf/suggestion/5aa7286dcf6c7556be5fe259 since a new sale popped up)

Sale 1: I don't know, might be cash

https://backpack.tf/profiles/76561198042340876#!/compare/1518307200/1518393600

https://backpack.tf/profiles/76561198131203701#!/compare/1518307200/1518393600

Sale 2: Probably sold for cash:

https://backpack.tf/profiles/76561198041580689#!/compare/1517097600/1519603200

https://backpack.tf/profiles/76561198053747026#!/compare/1517616000/1517702400 nothing matches here with the hairpiece

Sale 3: sold for 34 keys

https://backpack.tf/profiles/76561198259985834#!/compare/1517875200/1518220800

https://backpack.tf/profiles/76561198053747026#!/compare/1517875200/1517961600

Sale 4: sold for 30 keys

https://backpack.tf/profiles/76561198267189538#!/compare/1517270400/1517356800

Sale 5: Sold + Cloud 9 German Gonzila + Sunbeams Elf Esteem + 20 keys for Spellbound Tavish DeGroot Experience (using there)

https://backpack.tf/profiles/76561198267189538#!/compare/1517011200/1517097600

https://backpack.tf/profiles/76561198043566764#!/compare/1517011200/1517097600

Sale 6: sold for 40 keys; not all the keys appear in the compare link because some got traded right away, but there's the screenshot of the trade

https://imgur.com/a/wq1wn

https://backpack.tf/profiles/76561198192602363#!/compare/1520380800/1520467200

Sales we have: 30 - 34 - 40, all of them happened quickly so I'll take the 2 most recent ones, 34 - 40

Any constructive criticism is appreciated

That's all, folks