https://backpack.tf/profiles/76561198823736236#!/compare/1552176000/1552262400

https://backpack.tf/profiles/76561198157701642#!/compare/1551657600/1552262400

Purple Confetti FR-0 + 24 keys

After the FR-0 was obtained, it went into a bot:

https://backpack.tf/item/3673231306

And I can't find it anywhere in the bots' inventories.

That being said, the FR-0 has no valid minis.

https://backpack.tf/profiles/76561198823736236#!/compare/1548201600/1548288000

https://backpack.tf/profiles/76561198073438708#!/compare/1548201600/1548288000

26 keys + Pro KS Batsaber (11 keys) + Pro KS S. Reserve Shooter (2 keys) = 39

https://backpack.tf/profiles/76561198073438708#!/compare/1547856000/1547942400

https://backpack.tf/profiles/76561198034859126#!/compare/1547856000/1547942400

I don't know

https://backpack.tf/profiles/76561198313538268#!/compare/1554768000/1554854400

https://backpack.tf/profiles/76561198227657840#!/compare/1554768000/1554854400

39 keys

The Green Trophy Belt in that compare link sold here for an unknown amount of keys:

https://backpack.tf/profiles/76561198080179568#!/compare/1554768000/1554854400

And then upon receiving the keys, bought the Sunbeams Larrikin.

https://marketplace.tf/items/314;5;u17

Outdated but supporting, sold for $69.99 January 4, 2019, approximately 39 keys

https://gyazo.com/88255323a73442faffbb72da9c65a3df

buyers at 31 keys