I sold my car to a guy I have known my whole life. Wouldn't say friend but I know him. There was a few minor things wrong with it - which I told him about. And for that reason I sold it at a cheaper price which we both agreed on. It's now 3 weeks later and he has phoned me to say the car has gone into limp mode and it's been using lots of oil. He said he's taking it to the garage and if it's major I will have to pay for it or give him his money back. I can't afford to do either as I have just got a new car. Where do I stand with this please? It's the first time I have sold a car privately and not traded it in so I have no idea x