lel OP, mounts. Buy mounts :x Like the one that drops from lich king.
In all srsness, what you should buy also depends on how much are you gonna donate. Id like to mention that on warmane almost every piece of gear is obtainable in-game. Spending some coins on them speeds up your gearing process and gives you the time advantage. Not sure what the state of lolmourne and loldary is right now but if anything they are pretty damn expensive, and the loldary cata dags actually require you to put some effort into playing to even get it. So disregard all notions of "pay2win".

