The right price is important, yeah. A friend of mine who is doing graphic design tried to sell his stuff for like 5 euro each, noone bought it. Just for fun he raised it to 30 euro and sold a lot.

I would not go over $9,99 though.

Also, a bit unusual, but you could try get people to "let's play" your games. Depending on who is doing it, it's really good advertising (reason why minecraft became so popular).

People like Paulsoaresjr on youtube do Indie Game Reviews, maybe if you ask him nicely and send him copies he would do a lets play of it