You will find European cars more expensive here, but Jap and Korean about the same as the UK, well they were on $2 to the pound, but the pound has fallen again, so comparisons are difficult. Buying second hand is no problem, cars do not rot away here, no road salt. I know newer UK cars are protected but the brakes and bodywork eventually succumb, even BMW's.
We are currently driving a new Hyundai, a 15 year old Pajero (Shogun) and a 15 year old MGF. The older vehicles are still going strong and cost very little. You can get engine insurance for up to 10 year old vehicles quite reasonably.
Unless your cars are special, it is a utter waste of money bringing them over.