Would you be willing to buy a car that you had to build yourself if it would save you some dough? A Swedish company certainly hopes so (no, it's not THAT Swedish company).
Luvly is selling small electric vehicles for about $11,000, and while you don't actually build them yourself, they do ship in a flat box with assembly instructions for the small factories that will put them together.
Don't expect to take one of these bad boys on a cross-country trek, however. These cars have a top speed of 55 mph and a range of 60 miles on a full charge.