My boss has an 2001 s/80 t-6. He is selling it for $12,000. It has 68,000 miles on it and he has an extended warranty up to 100,000. He said that he originally paid 46,800 for it, but carmax was only willing to give him $12,000. Why does a volvo depreciate so much, so qucikly and do you think I shou...