/\ Fuck the Jones's!
I'm with E-Rock on this one; you're 9 times out of 10 buying someone else's problems. Just be prepared to do whatever you have to do to make it correct, and make the car uniquely yours.
You could do what I did; buy an "almost" complete car, find out all the problems with it, part out some valuable goodies to compensate for the problems, replace the problematic stuff with good stuff, and finish the build the right way
Only problem is that "my" way takes a lot longer than planned or expected, and also burns a lot of your mooooola. But, fuck it, it's all in the name of fun!