One way I price my diapers is to look the same kind up on ebay and see what they are selling for. I then price mine slightly lower b/c I want the TP mamas to get a good deal.You can also use the 50% rule which holds true for most diapers. If they are in good condition they should sell for about 50% of the new price . . unless they are hard to get hyenas. Another way to do it is to set a price and if they don't sell, just reduce the price until they do.