Here's a solution:
For $20k, hire a small private guerilla army. Nothing fancy, just a few ex-cons with machine guns and camo.
Next, find out the seller's home address. That should be easy; just do a Whois lookup.
Then instruct your men to surround his house as you calmly walk in through the front door. Tell him in the smoothest of voices you can muster that his house is surrounded by an elite task force, and that if he wants to survive the next 10 minutes, if not the next 10 years, he should hand over that ****Me.com domain name.
Grab yourself a glass of water as you wait for him to complete the transfer out formalities. Drum your fingers on the his work desk for added effect.
Once the formalities are done with, walk away slowly. At the exit, turn around slightly and say, "Thank you for your co-operation, Mr. (Insert Name Here). And by the way, here is a REAL appraisal for your domain" - and throw him a rolled up sheet of paper with a DNF logo on it.
There. Deal done, 5k saved.