I am not sure this is an exploit but today I noticed that the plans for exalted sovereign helm was at 120.00 and it sells to the vendor in game for 220.00. Not just that 1 either there are a few other plans in here that I noticed are under priced. So couldnt you set your AH bot to search for those under priced plans, buy them, and then have another bot that will go sell them to the in game vendor to make 100+ dollars profit per stack?