Given the case scratching in the pictures, the price doesn't seem unreasonably low at all IMO. In at least one photo, there appears to be a bad scratch in the crystal. The rubber strap appears well worn as well. If anything, I might try to get him to come down a bit.
BTW, if you scroll through his photobucket you can see some other watches of his.
http://s1125.photobucket.com/user/mc...?sort=3&page=1