Guild Wars 2

I would like to know this detail in advance so I can save some money.

Just save $50 to be safe, it will probably be a little less though.

works same here.

I have additional question, wil i be able to play even without expansion?

lancemid.7435:

works same here.

I have additional question, wil i be able to play even without expansion?

You will be able to still play the base game, yes, not the new content from the expansion though.