It can be very difficult to know the value of old postage stamps. Fortunately, there are several free resources available to hep you find how much your stamps are worth. One way to find out how much a stamp is worth is to review eBay's completed listings (ended auctions). These are listings that have ended within the last 15 days, including both items that did and did not sell (see example on the right).
Please note that accessing eBay's completed auctions report requires log in to eBay with your user ID and password at www.ebay.com. Only registered users are allowed to use the completed search feature, so you'll have to create an account if you don't already have one.