That's grossly overrated. Anybody who would buy a vehicle, then turn around and try to sell it deserves to lose money. I used to buy them at 50K. At that point you are buying tires, brakes, probably u-joints and front end work. The biggest mistake that I ever made while working for myself was not buying new... as I mentioned before I'm lucky that I never got stranded in one of the remote places I used to work. The worst was my "Certified Auto" '93 Dakota... It was so bad that if I had to work out of town I would call the garage to make sure somebody was available to come get me with a wrecker in case I broke down.
I bought it with 85K for $7500 and dumped that much into it in a year. At the time I could have had a new Ranger 4x4 extended cab for the same amount of money.