Online multiplayer game script browser based

Hi all. I am looking to buy an online multiplayer game script. I am open to suggestions as to what kind of game: text, engine driven, flash. I am looking for good quality and not a stolen or buggy script. Even if it's a clone of an existing game it has to perform well and a demo is a must. Not interested in pimp/mafia type of games. Please bid ONLY if you have a working demo or you can setup a demo and DO NOT bid just to post portfolio links. Thank you.