I think the Rarest is the Purple M6. GM always runs a limited production 'purple' car and I always love them. I would kill for a 98 purple GTP. I think they made them in 98 99 or 97 98. I have only seen one GTP coupe purple and one GT sedan purple. I WOULD KILL FOR ONE!!!! And im not talking the anniversary purple. So likewise I would Kill for a 04 Cosmo purple m6 with purple seats. But I have only found one anywhere its in arizone 24 miles on the ODO. So sad im a broke White boy. BOSS I NEED A RAISE IF YOU ARE READING THIS!!!