The highest priced one I could find was this account with several characters for $55.00 with twelve bids and one day left. I can’t really tell you how godly the account is, as I haven’t played the game in ages and can’t remember/recognize much. They are tons of complete auctions as well in the $40.00 to $70.00 price range.
You’re still better off farming in WOW, but I’m just amazed that online items for an eight year old game are still selling. Kind of make you wonder what kind of permanence World Of Warcraft’s out of game economy will have.