How much money do you put into a car?

Didn't think about the cost at all while I was building it - and enjoying it. Now that I am trying to sell it to do something different the reality of "putting stupid money in a stupid car" hits home hard... It all depends on what you want and what you can afford I guess. If you plan to sell it eventually and get your money back, start with a car that is popular (boring) and watch what you put into it. Otherwise just do what you can and enjoy what you build..