I have done the research so I can get mine appraised (do this too, that way you can argue for a higher price) and I will probably put a value of $15,000 on my truck (it helps to do appraisals at your work). Would I get that if I sold it? Probably not, but I don't think that is too far off either. When you get your truck built and painted, I would try to get $12,000-$15,000 on your truck, depending on how how you get it to look when it is done.