Bought my dodge truck in Atlanta, Ga. from an individual.  Talked to him several times and a couple of references.  He had paperwork to back up his conversation.  I flew down there, bought it and drove it home.
That was a fun flight.  Wife and I was in KC airport early in the morning and trying to get through the metal detector was a repeat performance.  Went through and failed, removed my belt and still failed.  Turned my pockets inside out, no pass.  Removed my shoes, no pass.  I began to unbuckle my pants and remove them when the agent let me through.  I found out later the challenge was it was a year after the NY attack, and we had one way tickets.  All one way tickets got special scrutiny.
Bought a Durango in Houston, Tx. the same way.  I paid a local mechanic $100 to put it on the lift and inspect it before I flew down.  The seller was fine with it.  No problem there either.  Guess I'm just lucky.