Comment by jacquesm

I'm guessing Paul Graham has never restored a beat up car to pristine condition. Your pristine condition car that will fetch you less than the new parts you put in when you sell it at what the market will pay for it. Restoring beat up cars to new state is a losing game unless someone pays you to do the work, except for some rare collectibles, which I am assuming are not your personal beat up car. And even then chances are just about even that you'll end up losing money on it. It's fun to do, you'll learn lots but please do not think you will make money this way, especially not if you put any value on your time.