I did that with CD-R's for awhile, went crazy buying them last year every time a rebate sale went on. Now I have 10 50 packs of Taiyo Uden made CD-R's (Fuji, TDK and Memorex) and 2 75 packs of Prodiscs that will proably last me for 2-3 years.
For CD drives im buying ONLY Lite-On (that come with Nero) drives now - I have bought so many cheap-ass CD-ROM drives that wouldnt play some discs, couldnt rip mp3's at high speeds, made lots of noise and vibrated the whole case or (for burners) couldnt burn all brands of CD-R's.
I bought the Buslink 52X $19.99 Best Buy deal because it was a Lite-On, It worked great but after 3 weeks the tray jammed up on it (I think the tray motor died - it just stopped working!) and had to take it back.
The cashier gave me the full price refund instead of subtracting the rebate from it (I even had the bar code cut out)! So I'm making some money from this deal. Thanks Best Buy!