Yeah I've seen it before too. Like Classic Coins said, it's for advertising, but I've also seen it with different prices too. I'm thinking unscrupulous sellers hope someone will bite on the auction of higher price than the lower price. Also, I've seen on other items, for example a digital microscope, they will list for 5 or 6 different prices to see what bidders are willing to pay for it, then they list for that price.