If you had paid $.10/credit by buying them from Listia you would have a point. Most folks get 500 credits free for joining and listing an item and more as they bid. I bought the postcards, the envelope and spent the time and $.44 to mail it to the correct address. You got 21 credits to mail a penny. At that rate you will go bankrupt - unless someone else is buying postage for you. I am offering something more like a 1952S penny which is rarer than a 1952D. When you buy 1000 stamps for $20 you will get parts of sets. Over the years I have completed the sets. I have essentially given away nice items for 1 Credit and paid S&H. When I see Forever stamps or Amazon gift cards bring 750 credits, then I think that 75 credits is reasonable. These postcards were made long ago and are beautiful and historic to a collector.