What i do, I just keep an eye in trade. If u see someone selling a design They always want quick money. ask them the price if they say somthing like 300g just ignore it. if they say offer do 70g ( all are higher ). I mostly whisper: my offer is 70g because saw on ah yesterday for 50g didnt had money at that time. 1 way of making money. Second way is Look for a GM of high guild ASk if they got anything for sale. They mostly have epix from doomwalker and kazzak ask price say its not that good and offer somthing around 300-700g how good item is, Then u sell it on AH for way more
This is my guide