Mid-engine supercars are out of most peoples' price range. That's why there are kit cars. While many have been Volkswagen Beetle-based abominations, not all kit cars were created equal.
The Fiberfab Valkyrie started out as the poor man's answer to the Ford GT40, with later models being aimed more at DIY customers. This 1969 model is a DIYer's dream (or potential nightmare), and can be had for $4,000.