Sounds high to me. If you go to Deere.com you can use the build and price configurator to get the msrp for your tractor and hoe. I would expect somewhere between 15 to 20% off of the list price.
I just traded my 4520 (open station) with 400cx loader and 485 Backhoe in for a new 5085M. There is nothing wrong with it I just wanted a new bigger tractor so I traded, it has a little over 700 hours on it. It is at Bader & Sons in Portland, MI ask for Bill 1-866-647-4164.