LOL you guys will hate me for this...
I bought my '92 Ranger without seeing it move, hearing it run, or knowing anything about it. Transferred the title, put tags on it, jump started it, had 2 tires installed, drove it home, loaded it with as much stuff as it would possibly carry under the camper shell, and drove it 2100 miles to my new residence.
The entire trip went without a hitch. After the trip, I changed the battery, put a starter on it and have drove it for 2.5 years with little to no maintenance! LOL
Backstory: (long boring read)
I needed a rig to get me from our place in WA to our new home in OK. I had just got done cleaning the house out and packing for 2 weeks solid, and loaded up my F-350 and a 16' trailer (over the scales at 18740 Lbs). Got 50 miles into the trip and blew the transmission up and caught the truck on fire. Towed it all home (thanks Mike!) and had to find another ride to OK to start a new job.
A friend's sister had just repossessed this truck from her brother. I bought it from her on the spot, on payments, and am still driving it today! The biggest problem I have had is a bad throwout bearing and a valve tick. Well, there was the damage the deer caused when I hit her when coming back from fishing...but thats not the truck's fault!
So not all used rigs have a bad story to go along with them.