Zappo
Explorer
It's free to play online. They'll release expansion packs, probably for around 30$, but I don't expect more than one or two per year, and you will not be required to buy them to keep playing. They have even assured us that the expansion packs will not cause power inflation (so you won't have to buy them in order to stay competitive).
Beware that it isn't really a MMORPG. GW is more like the idealized version of Diablo. Take Diablo (2), fix everything that you don't like save of the game concept itself, and you get a pretty good approximation of GW. Good graphic, excellent balancing, no grinding for levels, highly tactical PvP, player skill more important than character level, equipment a lot less important, a lot of interface advancements - but, still, Diablo at the core. The main difference in gameplay is that you spend most of your time either doing quests or doing PvP (rather than grinding monsters which is the definition of boring IMO). That, and the fact that you will always play in a party; after the tutorial, the monsters are way too powerful to kill by yourself with any efficiency.
Beware that it isn't really a MMORPG. GW is more like the idealized version of Diablo. Take Diablo (2), fix everything that you don't like save of the game concept itself, and you get a pretty good approximation of GW. Good graphic, excellent balancing, no grinding for levels, highly tactical PvP, player skill more important than character level, equipment a lot less important, a lot of interface advancements - but, still, Diablo at the core. The main difference in gameplay is that you spend most of your time either doing quests or doing PvP (rather than grinding monsters which is the definition of boring IMO). That, and the fact that you will always play in a party; after the tutorial, the monsters are way too powerful to kill by yourself with any efficiency.