<prompt> Human: So I got my car a little over 3 years ago as I needed something quickly to get me going from school to work and everything else. My mother was with me and originally signed the car. Since I was 17 at the time I couldnt pick what car I wanted. After school and I went full time and bought the car from my mother as we werent on the best of terms on it. I pushed the length of the loan an extra year realizing not the best idea now as lower payments made me happy. I am now and probably will be for another 4 years be underwater on the car until it is completely paid off. I really want this other car as it would be mine and I got to choose it. I have a base Ford Fiesta now and a used ford dealer has the fiesta ST trim used for 18k. They said they would give me 5,500 before I walked out. I know the ST trim holds value a lot more than my car. What should I do?I can give more info as needed to help get me information on what I should do.  <response>: What should I do?Keep the car you currently have. 