This is WoW Guide on buying low and selling high at the Auction House.
Today, we’re going to try and buy things in bulk and sell them off separately for a cheaper price. I am going to use Primals for this example as I find these the most profitable. All you do is search for every single primal in the Auction House and scroll down to the places where they are sold in stacks of 5 or 10. Now compare the prices with the Primals being sold separately. For example, if you see a primal being sold for 25g and a stack of 10 for 200g, buy the stack of 10 and then relist them separately at 24g each (or whatever you choose).
I just chose Primals for this example but you can use this for any item such as shards, essences etc.
Shards are easier, and more profitable, especiallyl if they don’t sell, since they have no list cost..
Also, make sure your margin is always at least 10%, as the AH always takes 5% off sales.