Well, the reatail mark up on nonessentials like electronics, hobby stuff, accessories for anything, are usually pretty big. A guy i used to work with used to own 50% of a radishack and he said on toys and cell phone accessories he made the biggest mark ups[sm=pirate.gif]. Not that he carried quality RCs but might be worth just looking into all the same.
Maybe carry some savage or traxxas parts or something as well and make a business of it.