A lot of sellers mainly overseas based in asia will list items cheaper but charge extremely high postage rates and not allow buyers to combine purchases. Ebay takes a final value fee percentage of the actual sale price so if an item only sells for 99 cents ebay will only make a small amount from that sale. However ebay wont make a cut from the amount being charged on the postage costs so these sellers make there ebay fee free profits from the over charged postage rates rather than the final sale fees. Of course if the buyer pays via paypal the seller still gets charge for the full sale amount but they are saving a huge amount on ebay fees by selling cheap and charging high on postage.