personally, I would stay away from most of the stuff on Dealextreme. It my be cheap but a lot of it is way to much hassle to get things working. The stuff they have is also not always the best made stuff.
BTW, Since I am a super grammar Nazi, I realized that you said "an gba flashcard" when it should be "a gba flashcard" as gba does not begin with a vowel. "an" is only to be used when the word after it begins with a vowel.