1. Cars with less than 80HP that are historically irrelevant, like the Daihatsus. 2. Duplicates. Take one model from each year, one 1992 Miata whatever the trim, its actual name, whether it's J, US or EU, one of each model per year. 3. Jay Leno Tank car. 4. SEMA cars. 5. X2014, that machine pulls too many Gs to be driven by a man, I cannot consider it a proper prototype. Like the X1 or whatever they renamed it.