This is something that members need to do on the own. Determining the price of things. Allow me to offer you a little lesson.

IF the item in question is UNDER 99,999nps, type the name of the item, identical. Other prices should now show up  99,999nps or lower. Take the one at the top, let's say it 37,700mps for this item. Now put in 37,699nps as you new max willing to pay and refresh again. Do this repeatedly until after 6 or 7 refreshes, nothing lower comes up, then set your price slightly lower, usually 5nps lower. You should now be the lowest priced of that item currently.

You may need to recheck your prices to make sure that you are still the lowest. I'm online so much that I check SEVERAL times a day! You should re-check AT LEAST once a day, and re-price your items as needed to make yourself the lowest again.

This is the fastest way to move items under 99,999 nps, thru your shop!!
I've made MILLIONS doing this and you can too!! 

If the item isn't on the Wiz, check the Trades/Auctions. The Chat Boards can also help you price an unbuyable item.

Good Luck and Rock On!!