I missed the ad but sometimes people put up to good to be true ads to collect email addresses to sell. Another thing I noticed is good deals get flagged and removed quickly, I think resellers flag them so no one else sees them. It happened to a couple of ads I put on craig's list using to different cities (some stuff was at the shop, some at home), they were flagged almost immediately after I put them up and I got emails from the same guy with low-ball offers. I've seen the phone number he sent me on many for sale ads.
Who knows, could have been real, every once in a while a sweet deal comes along.