I would be suspicious I was helping a friend sell a car last year and had quite a few of those ," I will arrange shipping and send a check" .. so they are buying the car with out physically looking at it? I just said no in person transaction only. I met a guy in a parking lot to sell a car once, it was only a few grand , cash deal but before I gave him the title I took the bills into the bartender at the nearby Applebees and had them check to make sure the bills weren't bogus.