I've seen a lot of good deals on different merchandise on Shapeways.com. You will also see ridiculous prices but I think that is because some of these people made the item for themselves and then just listed it for the heck of it with a crazy price. They figure if they sell it at that price, they will take the money.

Some people do try and get more than their products are worth, but that is up to them to decide. Afterall, they are the designers