T.H.
I just sold a Caddy Esclade 2000, had the same problems.
I drove it down to Carmax on Plano Parkway.
This SUV was clean also, they gave me a good price.
First check with Kelly Blue Book.com and you can see the prices before you sell. If you do go to CARMAX, I delt with Y J Lim a sales consultant, He was pleasent and easy to work with.
Good Luck,
Ed