How to price items to re-sell?

First you need to check your competitors prices. You will not get any more unless you have something to offer that the competition does not have such as a better looking store or greater convenience. Then once you set the price you can see how the product sells. If no one is buying, you are pricing it too high and you need to mark it down. If you are having trouble keeping the product in stock maybe you need to raise the price.