I bought a truck that was bagged several years ago, off of a member on here. At first inspection, there seemed to be a few issues, smaller ones, but nothing major. Price was fair (so I thought), and I bought it. Drive it home (7 hour drive by the way) and noticed a SERIOUS vibration in the rear.
Turned out, the previous owner had replaced the u-joints, but not put the caps back on, so the u-joints were flopping around all over the place. Surprised it made it home like that.
After a through inspection a few days later, I found LOTS of issues with the truck, including wiring, air ride setup, etc....
I endedu p with around 40 hours of labor in it, fixing and redoing the setup to make it safe and reliable.
Afterwards, I decided I no longer wanted the truck. I sold it for about $1500 profit, but that was not taking my time into consideration (which, at that point, I had nothing better to do anyways, and it kept me out of trouble).
I will NEVER buy a truck again that is already bagged though. The only exception would be if I knew the person who did the work personally, and knew it was done right. Otherwise, I wont make that mistake again. Ever.