It all comes down to how much you can afford and whether or not if you want to buy something tested. Granted that new cars have reviews and tests to help people understand their performance. However, experts of used cars for sale online in UK suggest that the primary reason anyone buys a used car is because of two main things. Budget and proven performance. That is why, if you are tight on a budget and want something proven, then you might as well buy something used over new. Did you find this useful?