Got an 8g c6 Sandisk a couple months ago, its great. Costed me about $20.
Any more than that and I'm going big, highest class 16 or 32 I can find, but not soon, this 8g will do fine for me for quite q while longer.
no stupidity involved. no worries. if you are shopping at a retail location more often than not it will be a class 2, unless its a computer specialty store. anything above a class 2 should state which class on the packaging or the card itself will have a class # with a circle around it. see the #10 with circle in this photo of the Kingston class 10.