There are three main Stores in GFO. There is the General Goods Store that sells Weapons, Consumables, Armor, Outfits, and Materials. All things sold there are pretty basic and low level. 

There is the Pet Store that sells basic level pets that have no other use than personal comfort and astetic.

The last is the Service Store. This store sells guides and whatnot about GFO. It's considered kinda imerson breaking by some, but a good place to go if you cant beat a boss.

Player run stores:

Player run stores can varry on what they do. From high level weapons to armor and outfit creation, they offer better stuff than the General Store, but at a higher cost.

Currency: The currency of GFO is Coins. Coins have three forms, Copper, the lowest. Silver, the mid. And Gold, the top.

Copper is One Copper Coin

Silver is Five Copper Coins

And Gold is Ten Copper Coins

That wraps up this section.