i am seriously thinking about buying an Exmark Metro 48" Walk behind Mower 1995 model. It is Belt Driven, has a Kohler Command 14HP engine, and the mower is in good condition. included is a Velke Sulkie and a seat with wheels that attaches to the mower. the owner of it says he has only mowed his own lawn, which is quite big. can someone give me an estimate on the value of this please???