10. BMW M Coupe
The oddball M Coupe of the ’90s was perhaps one of the most unique-looking examples of a BMW sports car. What we have here is a hot hatch, but in luxury form. Based on the Z3 sports car the M Coupe had a lot to be liked. But it also had some issues that make it nothing more than a collectible relic. First, the extremely short wheelbase made it a pain to live with. Then you had the transmission problems that plagued this generation. Shifters would get sticky and stop working altogether. Transmission repair on one of these is extremely expensive.
Although the M Coupe is a collectible, the negative issues far outweigh the benefits. You can find a new generation M Coupe that will give you a lot less trouble in the long run.