here's one of many tips. And every server is different. My economy is horrid. But i buy Nether Vortex & Primal Nethers & any Primals Low watching people "WTS" normally they undercut the AH severely then I take them and resell them for what I know they will sell at. It takes time and I can tell you the AH prices changes from day to day on my server. I sometimes buy "Nether Votexes" for 200g from those people who can't wait to sell on AH then turn around and resell them for 270g. 70g profit! another thing I look for is... Lets say there are (6) primal fires up in ah. 1st (3) are listed @ 23g, the last 3 are listed @ 30g. Knowing that on my server primal fire sell well, I would buy those 3 primal fire @ 23g then relist for 30g. that's a 21g profit. You boviously need time to scan the AH for deals like this but in the end its worth it. Like I said I devoted 3 weeks just AH'ing and nothing else!