As far as I know, as long as you're not a licensed dealer, there are no restrictions against selling traditional rifles in NY. I think this is one of the "Loopholes" legislators are trying to close. Might be a different story with military style firearms. Over the years, I have sold & advertised a few with no problem. I would, however, get a bill of sale with serial # signed by purchaser
to CMA in case it ended up in the wrong hands somewhere down the road.