Found this game aswell priced up for £4.97 along with Enemy Territory: Quake Wars Collector's Edition on the PC. Not my type of game but I'm sure there are guys out there who will love this game. Iv got a work colleague whose friend plays it everyday!
It's not available online and next cheapest it's retailing at is Play.com for £7.99. Other places selling it for more.
The game comes in a limited artwork tin packaging which includes the Game DVD-ROM.
Again you will have to go to your nearest PC World store as they are still marking up all reduced PC games and you should find this edition of Jade Empire within the bargain PC games. There was one copy of it in my local branch, so i think you might come across the same issue of finding a copy.
Don't think this will be voted as good as my last 2 posts, but worth a try.
So for £4.97 that has to be a steal!!!