We've got 2 Excursions for sale locally atm. One belongs to a veterinarian that is a friend of the family and he's had a lot of interest it, but no serious buyers yet. It's almost as frustrating selling a used car as it is buying one.
Friend just sold his 05 Limited 4x4 with a 6.0 (junk motor no matter how much you bulletproof it) with 160K miles on it for 22K. Granted it was a solid southern car, garage kept and not something from the north I can't believe people would pay that for a suspect engine used truck it's crazy. Ironically the guy financed it too.
Ironically you can find V10 4x4s with under 130K miles for under 8K all day long. For that price you could slap in a common rail cummins and G56 and still be money ahead.
I personally wouldn't touch a car from the north, I have yet to see one that's more than two years old and not starting to rust unless it sits in the garage all winter long.