Butt what does it mean?

After more than three decades in Hong Kong, I pride myself on my ability to interpret Chinglish, but occasionally I find myself at a total loss.  Presumably "optianal" means the best combination for my bum, but why would I want to perm my previous vehicle?  And if 3 tupe (whatever they may be) cost me $388, why would double price cost me less?  So many questions, so little time...