I bought a car off of Craigslist. I met the guy at his "worK". He told me it was his "son-in-law's" car he was selling me. I paid cash and he handed me the signed title. I drove the car a couple of times, when my husband found the exact car we really had been wanting. We went and bought car #2. We listed car #1 immediately and a woman bought it. I gave her the same title I had been given 5 days earlier. She took the car to a mechanic and says there are many problems with it that don't make it worth the amount she paid. (She paid what I paid) She wants her money back. I didn't even have the car long enough to transfer title--now she has the title and the car. I feel it is out of my hands, and it is her car now. She's threatening to sue me. What is my responsibility here?