5 months agao i made a verble agreement with a girl to trade cars even, at the time the car i had was driveable and the car she had was not. We traded cars but never signed titles, now that the car i have (the car i got from her) is driveable she wont sign the title over to me. She now claims there is a mecaincs lien against the car (witch she never mentioned before) and wants to trade back, and i want to keep this car, i spent a month working on this car to get it driveable. What are my legal rights and what can i do?