When I have been the seller, I received payment and waited a week or so until the banks says the funds are legitimate. What took the most time (almost two months) was getting a lien release letter from the bank I had the vehicle financed with. So after getting the lien release two months after being paid I gave the buyer the title/vehicle.
My suggestion would be a compromise. Go inspect the vehicle, pay for it, write up a small contract with each party getting a copy, also get photocopies of the other parties drivers license. See if you can take the car, but the seller keep the title until all of the paperwork clears. This is how I did it once.
The other time the seller wired me the money, and I met him to deliver the vehicle and title two months later.