Green thing

Sale 1:

https://backpack.tf/profiles/76561198091502579#!/compare/1550188800/1550275200

https://backpack.tf/profiles/76561198119634686#!/compare/1550188800/1550275200

Presumably, a quickbuy. Not going to use this sale: https://imgur.com/a/uxe14RS

Sale 2:

https://backpack.tf/profiles/76561198119634686#!/compare/1548201600/1548288000

https://backpack.tf/profiles/76561198072766994#!/compare/1548201600/1548288000

Unclear (It was sold for keys. But, Cheerful bought 2 unusuals with keys missing).

Sale 3:

https://backpack.tf/profiles/76561198072766994#!/compare/1546387200/1546473600

https://backpack.tf/profiles/76561198061182096#!/compare/1546387200/1546473600

= 60 keys

Conclusion: priced at 60 keys. I am not sure how the 3 key difference in Sale 3 occurred and I haven't checked all the key's IDs to confirm this. Assuming it was 60 keys.