I see MMORPG all the time and I rarely play video games. (Xbox only, no PC games) I would venture to say that those who don't play video games won't know what it means and won't care about the contents of that site. People who play video games know what it means and thats your target market and the only people who really matter.
I would say $100 to $250 because your more likely to open a web store / create a web site for MMORPGs in general then you would for just one signle MMORPG. If your creating a site about one specific game, wouldn't you open GamesNameNow.Com instead of MMORPG.Net?
Andrew