Actually, what generally happens in the US with eminent domain is an independent appraiser comes and the government then pays a significant premium OVER the appraised value. For example, in Kelo v. New London, the NLDC offered all the eminent domain'd people *twice* the appraised value of their homes.
'"We haven't any use for old things here."
"Even when they're beautiful?"
"Particularly when they're beautiful. Beauty's attractive, and we don't want people to be attracted by old things."
"But the new ones are so stupid and horrible... Why don't you let them see Othello instead?"
"It's old. Besides, they wouldn't understand it."'
-Aldous Huxley, Brave New World