I don't think that I'd start worrying until I got the offer. The only time I've had to go through this, I got a fair amount more than I paid for the car. There should be plenty of evidence around for its worth.

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For Sale: 1982 MB 300TD
1995 Chevrolet Suburban 6.5TD

Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel