On a tangential note: I was shopping around for MicroSD cards (I suspect my kitten has "disappeared" my 32Gb card) online, as well as perusing last year's BF ads. What I found was that MicroCenter has, both in-store and online, 32Gb MicroSD cards (not generics, either) for $15.99 (to put it in perspective, that's how much my first 1Gb thumb drive cost in 2007); that's better than any BF specials from last year. Now, MAYBE there'll be lower prices on Black Friday, but if so, it won't be by much; I wouldn't strain myself too much trying to hunt down those deals.
^ An excellent addition to this conversation.
Something to also keep in mind, the class assignation of cards indicates how fast the card can take info and how fast it can deliver it. It's not perfect, but its generally a good metric to rely on. If you're just using the card for app/game storage, class 4 is fine. If you're quality streaming media, especially video, class 10 is probably what you should get. I was able to get 32gb class 10 microSD cards last year between Black Friday and Christmas on Amazon for $18ea (since I bought two, shipping was free). I felt really good about that value.