To my knowledge there aren't any bootleg 3DS carts in wide circulation, if that's what you're asking. It does not seem to be economical to do so since installing CFW is relatively trivial.I'm more interested in buying original 3Ds games and my question was is someone buying games from Amazon or eBay and satisfied with what they got?
(There are legitimate carts that can be faulty, but that's true of any system.)