If you don't want to either drive/fly to see the car, or be able to have a friend with mechanical knowledge look at it. Call up the sellers local Nissan dealer, have it either driven or towed (at your expense if it's not registered) and pay the dealer to run a full diagnostic analysis of the car. It should run you 75 too 150 dollars without including the optional tow in. I did that when buying my recent Audi. Good luck.