Hi Diane
I have seen some on Craigslist by me. But be VERY careful, as people will need to come to "see them" and you certainly won't want to have people coming into your home (and potentially casing it) to see what else you have. They're valuable and so's you safety!
Consider placing them on a table in your garage and having another person with you when showing/selling them. I have bought and sold them on ebay and when selling, just included my "costs in auction" as I know many feel teh fees are high. But it is really not difficult. There's also companies that will do it all for you for a fee, not sure what they charge though.
Good Luck!!!