yeah its a sad state when u see the prices drop to what they are today compared to a year ago. I tried asking an import dealer what mine was worth as a trade a couple months back and they offered me 15K max..(99 GTT Auto with around 70ks).
They would obviously try and flog it for 25k if they got it and make a tidy profit. Try selling privately if you're not desperate, you won't lose as much.