I only had the time to hit one garage sale last Sunday morning before going back to work and the only one in my area was in a pretty big city, i usually pass on those since there is too many reseller and people tend to overprice things but that one proved me wrong, i did come back home with some pretty (and cheap) stuff.
PS1 (0,50€ each)
Doom
Dragstars
Populous
I've also found an Equalizer CDX for 1€ (it's the french version of the Action Replay CDX and Gameshark CDX).
PS2 (0,50€ each)
Eighteen Wheeler: American Pro Trucker
Fur Fighters: Viggo's Revenge
Pinball (aka "Play it Pinball" on the spine)
Xbox 360 (1€)
Dungeon Siege III - Limited Edition
PCSomeone was selling some Bigbox for 2€ each, after a few minutes of talking i got the lot for 10€ and he even given me for free "Le Miroir Sacré du Kofun" (The Sacred Mirror of Kofun), a pretty unknown french adventure game.
Evidence
Ground Control
Hardline
Imperialism
Le Miroir Sacré du Kofun
Spycraft
Super EF 2000
Z
I also got a Thrustmaster Top Gun 2 Pro Shock for 1,50€ and the collector's Edition of Assassin's Creed Revelations for 2€, don't know on what system the box is for since sadly it came without the game (which i don't really care about since i already have it on X360), what i wanted was Assassin's Creed Ember only available inside some edition of Revelations and i didn't want to pay a lot for that short animated film so i'm fine with an incomplete version.