Here are some items you need to maximize profit:
Bisco's leash: look for atleast an 80% quantity Bisco's
Ventor's Gamble: look for increased quantity and don't mess up your resistances. Wear 2.
Bisco's Leash: really only for the quantity.
Windripper: quantity and a decent bow.
If you feel more troublesome, you can also buy online through the Internet. The POE Orbs you buy on the mmoah website are much cheaper, and the most important is the fast delivery, which is the easiest way to get POE Orbs. I also do this often.