Everyone knows you can leave Costco Wholesale with a cart brimming with oversized tubs of peanut butter, a TV larger than your living room wall and enough toilet paper to last a decade. But did you know that the warehouse chain sells gold bars, too? Costco has started selling 1-ounce gold bars. You can choose from two variations: a 1-ounce gold PAMP Suisse Lady Fortuna Veriscan bar and a 1-ounce gold bar from Rand Refinery. Both types are available online only and are limited to two per member.