Selling Omega

Hello community, I have a problem. I offered my Omega for sale at Ebay because I had an accident at the beginning of the year. I listed all the defects I know and also wrote in that I sell him as an accident car / spare part donor. Now I get two messages from the highest bidder. I should call all defective ones. Since I am not a mechanic I can only write what I know. Therefore also sell as an accident car etc. Answer from him was then there s I should call again all defective ones he buys the car in any case. And then turns out still defective or defects I did not mention he wants to sue me for damages. Do not know now how I should behave after all written without warranty / guarantee because it is a accident car. Did not answer him yet. Should I lock him and/or report ebay? Greeting Zony