Very likely it was a third party seller. Wal-Mart's website is similar to Amazon/eBay where other people can sell their stuff, used or new, and set whatever price they want. I think it's just harder to spot on Wal-Mart's site. When Wal-Mart is the seller it will be for the retail (or sale) price. It might be depending on what you're using, but when you are searching it should say "sold by..." and that will give you an idea. Used to work for Walmart and the number of times I had to deal with "but its here on your website."