You realise Z4's are worthi nothing right now?
Nobody wants a Coupe - they are for bald people with no taste
White is a tough colour to shift you know. It has conotations of white vans and domestic appliances.
At least it's not an M. Oh 5hit it is.
Tell you what. I'll give you £5K now and the give you another £5K when you come back from the USA. Yes I realise it is a very charitable offer considering the difficulty you have being stuck with such an un-wanted car but hey - we all like to do our bit for a good cause.
Seriously though. You will get your arm snapped off for a white MC. It will be a future classic but it makes no sense to keep it unless you just want to.
My mate moved to KSA about 20 years ago. He still has his cars stuck in his garage with everything siezing up on them.