Obviously, you're buying a car unseen from the other side of the world via auction so there's an element of risk to that. The car could turn up in any kind of condition – it could be hiding dodgy bodywork, mechanical issues etc. You'll be responsible for all the fees in shipping the car across (although there are companies willing to handle this), so the costs will soon mount up. You'll have to inform HMRC, who may well charge you additional fees, and then you'll have to get the car registered with the DVLA. Ongoing costs might be expensive, too – insurance is likely to be more than a UK-market car, while parts might be expensive and difficult to source (depending on the model). And, when you come to sell it, you might struggle to find a suitable buyer willing to pay a good price.