if you are going to take the wheels off, don't leave them in the garage
if this guy wants the car and has gone through all this to get your phone number etc, i would have made sure i'd have left my phone number so the person potentially flogging it would get back to me if there was a change in plans, especially if i was coming from a long long way away
sounds a bit suspect to me mate, even if the guy IS on the level
i've invested in big bits of steel in my garage, i can bolt the car to them AND have them post things up so the car can't move