I do the same thing with DVDs. I watched my Princess Bride DVD for the first time after owning it for about a year, and discovered it didn't work. By then I didn't have any idea where I'd gotten it anymore, much less a receipt. I ended up going to the nearest Wal-Mart, buying another one, switching the broken DVD into the new case, returning it that way so that the bar code would scan correctly and everything, and keeping the new DVD. I felt clever.