Lesson learned in high school...I let a 'friend' borrow a copy of one of my N64 games and it came back cracked. Wouldn't even fit into the game slot and the guy said to me that it had to have happened after he returned it to me. Ooooo the nerve. >.
I've never had any problems with BB and price matching. I have done it three times thus far. Just make sure to have the policy in print with you because not all cashiers are trained in the policy. Be firm, but polite, and generally you will get pretty far.
As far as online retailers, I don't...