Site Not eligible to character selling

[nofkfkfkfkfk]

Hi, i'm planning on selling a character but when i try to put it in the trade option it sells i'm ineligible for selling
Could anyone tell me why is so ?
ty in advance, have a nice day

[Skuddy]

you need to have spent real money here (which gives you a premium account) to sell.

[Winryi]

Donation of at least $10 to access the trade.