Hmmm....Im gonna have to say weed. Mostly because it was a large amount of some really good fire, but if it would have to be a non-consumable item I would say yu-gi-oh cards. I remember ganking a bunch of them packs from wally world back in the day. I had a forget-ton of awesome cards and now I have NONE. (My friends mom burnt them all because she thought they were "satanic")
Bitch owes me.
I'm usually the unlucky bastard that gets caught though, so I tend not to take my chances.
Stealing is bad !!!!