Scam, I've seen this ad all over the country on CL. I think they change the amount by a dollar or two to make it harder to check up on it. Seems like they stole the photos from a legit posting that was on ebay.
What happens if you respond to the add with an "I might be interested but I'd like to see it first. What part of (city the pin is supposedly in) are you in and when is a good time to come by?"