To your question on another post.
1:5 rate means 1 forum gold ( Displayed at top right corner ) for 5 gold in Dragon Nest.
Forum gold can be obtained in many ways, but most common is selling items or in-game gold for Forum Gold.
You can also purchase forum gold at a really bad rate using real money.
Offering real money for items and in-game gold is not allowed and you will get banned / warned for doing it.
There are rules you can read using top right corner "Help and Rules" link.