OK over the weekend I sold a car to a man who said he was in desperate need of the vehicle, so I held the car till he could come get it. I told him everything that I thought was wrong which was no heat, no rear shocks and that I thought there was an exhaust leak but was not sure. And I was consistent on the exhaust leak BC he had kids and I was nervous about him having kids in the car if that was the problem but even told him why I thought that BC he told me he worked at a transmission shop and knew a good bit about cars. Anyway he comes and brings a diagnostics tester, looks under the hood a good bit, and I even let him test drive it down the road by himself. I even told him that I only had it a couple months and we replaced a hose to the water heater but other than that I didn't think anything else was wrong. He asks me if it has overheated and I said no it has never overheated with me. He buys it brings it home and messages me the next morning saying I lied about it over heating that the head gaskets blown. So I told him I didn't appreciate being called a liar I told him what I thought was wrong but wasn't sure. But I would refund the money anyway. After that he apologized and said he would talk to his wife about bringing it back. I waited all day and had messaged him three times during the rest of the day asking him when he was bringing it and if he was and got nothing from him until almost 8 that night. He says that he liked the car and that he is trying to fix it. So I thought that was it he was keeping it. He then messages me saying that he spent $150 dollars getting the piece and that if it don't work he will bring it back. After that I did not feel comfortable with giving him his money back after he had taken it upon himself to fix it. Bc not only did it run when he left and never over heat, but when I offered the money for when he told me it was broke he should've brought it back then not when he tried fixing it and it possibly be worse by something he did. Well my husband tells him that we are sorry but we cannot give you the money back since you took it upon your self to try to fix it instead of bring it back when I offered the refund. We sent that at 11:50 at night BC my husband works night . he messages me at 4 in the morning saying he is going to see me in court and that I lied and that when he was fixing then gasket he saw the motor had been worked on before. Which i thought was weird BC why didn't he message me that earlier when he was fixing the gasket. I have not messaged him back. I just want someone's opinion on it BC I know I have not done anything wrong I have all the messages printed out where I offered the money back and where he said he fixed it but I never said as is but Im pretty sure its self explanatory. Help!!!