I stupidly sold my numbers matching 70 Chevelle SS 396, online. Both buyer and seller had a good experience, though doing over again, I would never have sold that car! The buyer bought my car by just looking at pics. He requested a pic of just about every inch of the car, including serial numbers of the whole drive-train and undercarriage.
Shipped it from Jersey to Montana. The car did not leave my garage till I was paid in full.
He took a huge chance of getting ripped off, being I could have kept car and money. Lucky for him I'm not like that! He was very happy with the car. Personally there's no way I'd buy a car without seeing it in person, along with being there for the whole transaction but that's just me!