Feeling blue that all of the affordable classic options are quickly becoming, well, not so affordable? There are still bastions of value if you’re willing to overlook the flash of the big names and instead just focus on a clever, unappreciated car. The E21 might just be the most unappreciated BMW ever brought to the United States, but most of that reputation is thanks to a relatively soft M10 engine allocation and one of the worst applications of federally mandated crash bumpers. Move on up to the M20 and the associated European trim and the story changes quite a bit. Suddenly, you have a 7/8ths scale M635CSi on a very affordable budget: