trying to get a ballpark value of an 87 gn. car has 60k miles but does not have original title. mileage is consistant with dmv records. no rust or body work and no body damage, has original paint but needs repainted. has small crack in dash on passenger side and some wear in carpet on driver side by gas pedal. motor is original with no mods. radiator and heater core have been replaced. multiple owners. any ideas? thanks