TreeFarmer2,
If you have not done so already search the TBN website, especially under the JD pricing forum, and you should see a couple of threads about 4700 prices. If you search on my user name and 4700 you should get a few hits. /w3tcompact/icons/smile.gif I seem to remember a couple of conversations about 5210 prices as well. The 5210 should cost quite a bit more than a 4700....
The John Deere web site as a configuration program that shows list prices for the 4000/5000/etc tractors. You can pick the exact features on the tractors in question and get a price quote. I wish I had that resource when I was buying. The program will show you the list price difference between the two tractors.
Good Luck...
Dan McCarty