Team Fortress 2
Counter-Strike: Global Offensive
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Sold for $41 (21 keys)
Sold for 25 keys
Taking 21-25 keys
Sold, along with Abduction Universal Translator + Tesla Coil Human Cannonball, for It's a mystery to everyone Prehistoric Pullover** [98(or 94)-41-33=24(or 20)]
** Mini for Pullover
Up-to-date price, however 2 sellers at 94 and 1 at 98
This is the most recent sale, but it's perhaps to bulky to use anyways.
22 pure https://imgur.com/a/2d0LJjm