I have a BMW convertible and from a Nissan dealer the offer to simply exchange the cars: Nissan 350z Premium with Alezan leather and Rays BJ 04/2004 13,000km BMW 330ci cabrio Year of manufacture 04/2003 46,000km, titanium grey, leather black, M-technic, Navi with TV etc. Would you exchange the cars? Thank you very much. Timm