I personally wouldn't but purely out of a moral (if you want to call it that) objection to selling to pet stores. I figure that if and when I breed my pair, I would want to send each and every one to owners that at least seem competent, selected by me. People that buy chameleons at pet stores tend to be impulse buyers that might not be good keepers at all, and this might spell doom for the babies that you carefully tended to as eggs and then invested so much food, time, and money into to raise them to selling age. But this is just me, most pet stores don't care for their reptiles very well to begin with. I'd hate to see who buys them.
If you do want to go ahead with it, I would talk to the owners ahead of time, to see if they'll even let you. They usually won't buy from you unless you've got a vendor's license or something like that. At least all the pet stores near me won't. So you'd have to scout that out before you get into anything.