No matter what the price of an item is on the GTN, if it sells, it is not over priced. Please, lets not get this game off to the start of so many other MMOs where people insist that something is over priced simply because its more than they want to pay.
If its overpriced, it will not sell and they will relist it at a lower price until it does sell. Market demand drives prices, not some arbitrary idea that you had about how they only had to click a button to get an item, therefore they should sell that item for cheap.