They want to buy my vehicle so I came here to get ...

They want to buy my vehicle so I came here to get an appraisal but the purchase intention of $17,800 was very shocking to me. I've already been offered for $20,000 ~ $21,000 from other dealers and the amount is actually a huge difference from this dealer. I really wasted my time with this dealer on May. I only remember the salesman who helped me was really kind. I ended up trading in my vehicle for a new one for good price now. Never sell cars here!!