100 Cd-r $18, 100 Dvd+/-r $40

well i’ve seen a couple of posts about bestbuy deals, but i saw on bestbuy that you get free shipping on 100 TDK CD-R 80Min 700Mb for $18 and 50 DVD+/-R Memorex for $40 but it includes a free 50-pack…

anyone got this deal and are the quality of these brands good? there must be a catch…?