Yes, if it's not moving on eBay, I would try the flea markets. As a booth owner myself, my profits are far better at the flea market than on eBay.
But don't give up! It's still slow for everyone right...
I agree strongly with Don, taking somone,s personal cc info, is just asking for trouble. That is a good way to set yourself up for a bogus fraud claim.
The buyer could always just send you a money order.