Sell character / wutheng

Hi I want to sell my character, I owe 7 coins but when I want to create offer its always wrote me :
A minimum of 5 coins is required to sell via the trading system, you have donated for 0
dont understand this ...
2nd. is ... Can I change race from Nelf to dwarf ? thx a lot for answers and have a good day

1. Trade is for premium members. Upon successful sale, a fee of 5 coins in this instance is taxed once the sale happens.
2. If race change is available on the realm, and the class is available for both races.