I just got back from BB and there is a lot of confusion regarding the 50% sale today -- I wanted to get a 50 pack of DVD-Rs, one guy told me no, that was only a 6 hour sale (knew he was full of crap). Next guy told me yeah, they were 50% off but he couldn't tell me how much. The next girl told me they were $19.99 but that she'd check, and came back and said they had gone up to $27.99. I decided to just go check out and see if the rebate would come up going out; it didn't and I said I thought there SHOULD be a mail in rebate per the ad (and knowing online there was, or SOMETHING which brought the price to $19.99), the cashier called the manager over who looked at the ad, looked at my DVDs, and after a few seconds of hemming and hawing, told her to take 50% off the $27.99 price as per the ad. (I was REALLY nice, I kept telling them I thought the price was $19.99 after rebate but if there was no rebate I just didn't want to get them-- wasn't being nasty or anything, just trying to find out)
I got very quiet and happily walked out of the store with my 50 pack of Fuji (Taiyo Yuden) DVD-Rs for $13.99.
Obviously, a major MAJOR YMMV.
I only wish I had more than one pack in my hands at that point.