There are 2 types of currency on the server: Gold and Experience.
Gold can be used to purchase lower-end gear and everyday things. It is dropped by mobs and can be obtained through player trading. A gold nugget (1g), a gold ingot (1G), and a gold block (1GG) can all be used in purchases.
Experience is reserved for housing and quick travel. There are 32 level plots, 40 level plots, 80 level plots, 35 level townhouses, and quick travel to outposts.