need all possiable leagle ways to earn coins

i want to know all leagle ways to earn / farm coins on icecrown i also donate 20-30 euros per 2 months but beside that i need more ways to farm cois
because i need to buy Trade section character so i need eo farm like 500-600 plus coins only then i can buy character from character Trade on website bis one
so please help me and tell me all possiable leagle way to farm coins here ( like Boe item Trade for coins on website or event reword coins etc)
thanks in advance

Everything that works using the warmane trade/marketplace is legal. You are not allowed to get coins for "non warmane goods" or any kind of services.

The easiest - and only viable - way to get coins is selling gold. Atm. the conversion is ~ 1coin/4.5k