I currently own two cars - an 07 reg Ford S-Max Titanium and a 53-reg Citroen C3. Both have relatively low mileage but their book value will not reflect that. I am relocating to the US for work reasons and may be there for years.

Should I sell the cars or keep them stored in the UK, where I will return once or twice a year? If I sell, where is best? If I store them, how is best? If stored, will they deteriorate rapidly or survive being out in the open to all weathers?