And earlier this month, the big box store began selling platinum on its website. A 1-oz. bar of the metal will run you $1,089, a small premium over platinum's spot price, which recently hovered ...

Costco is expanding its precious metals offerings, building on top of its rollout last year of gold bars, which often sold out within hours. The retailer is now adding 1-ounce platinum bars to its ...

The wholesale retailer is selling a 1-ounce platinum bar, as well as a 1-ounce Canada Maple Leaf platinum coin on its website, both listed at $1,089.99. The products carry a markup of about $94 ...