I'm in need of several (25-50) dual layer dvds. I've accumulated several things that I would like to back up onto disk, and 4.3 gigs just won't hold them. Problem is, I don't know where you can get these things for any less than about $2 each. So do any of you guys buy DL in quantities of more than 3 at once? What brands? And what is your success rate like?