well, you dont need any money for repair too. And items at vendors cost all 2 gold.

The gold on annihilus is handled a bit different. You get it via a couple things, like voting the website up via the banners on the mainpage (Home -> on the left side theres "vote for us" with 4 different little pics.)

You can buy things at hadriel then that are really powerful. And like i said, the normal stuff like repairing or reviving a follower doesnt cost any money therefor.