Whats the difference?

OK, im hoping to get guild wars soon, i went on amazon, they had guild wars for something like £23, but then there was a special edition for £16, why the price difference? are they different or the same thing?

SP edition is the same, i just bought SWP edition from GAME for £9.99!!! still think the deal is on!!!

With SP eidtion you obviously get the game and correct key, you alos get free items/upgrades etc with SP editons,along with a nice booklet of GW art there is no difference...maybe they have loads to claer hence the price drop?

Ah yes, ive just seen it on GAME, ordering soon, thanks for your help ;D