$0 if you let it sit parked somewhere and do nothing for it.
But.................
Invest a few dollars in having a really good logo developed for this name, and have them add the concept of a doctor in the logo holding a hammer with a house behind him, display it on the main page by itself on a blank white screen, email a few house-flipping, home-repair, construction company websites with a clean pitch, follow these specific instructions and you could get an $xxx offer from the right person who likes the concept, knows domains and has the money. I think it'd actually be a quicker sale than you think. There are thousands of end-users out there with deep pockets on this one.
It could be marketed as a brandable and the logo will do the selling and putting emphasis on the "MD"/doctor brand because the keyword is strong enough. It has to be a Premium logo.
Now if you don't do any of those things, $10 bucks.
G'luck