These are being clearanced for $4.97. There appear to be plenty of them for store pickup around me (Minneapolis), but could be different in your area. I initially only bought 4 that most interested me, but read some reviews of the rest and decided to get them all (well, already have Guacamelee digital on WiiU, but hey, sucker for physical and $5).
IMPORTANT EDIT: Apparently there were mistakes made with the Steam keys that were included with many of these releases such that they are invalid/already used/whatever. There are supposed to be replacements available from Gamestop, but this is fair warning that you may have to deal with that. I've also read for Axiom Verge you can go to the developers.
Some partial copy/paste cause I'm lazy...
Each one comes with:
An exclusive SteelBook case
Full-color instruction manual
DRM-free game disc
Soundtrack CD
Mini art print with Steam key
Nuclear Throne
Rogue Legacy
Axiom Verge
Guacamelee! Super Turbo Championship Edition
Punch Club
Jotun: Valhalla Edition
Awesomenauts
Chariot
Stories: The Path of Destinies
Thomas Was Alone