Costco is hoping to build on the success of its precious metals sales by adding Swiss-made platinum bars to its gold and silver offerings. The company on Wednesday announced it is selling the 1-ounce ...

First, Costco sold gold bars to its members looking to invest in more than bulk household purchases. Now the warehouse retailer is selling silver coins too. Costco began selling 1-ounce 24-karat gold ...

After Costco's gold bars flew off the shelves, the wholesale retailer turned to selling silver coins. Sold in 25 tubes, the 1-ounce Canada Maple Leaf Silver Coins are priced at $679.99. The coins from ...