If you're planning to buy gold at Costco's warehouse stores, you may need a backup plan. Here's where else to look.

The company sold more than $100 million in gold bars in a three-month period between September and November 2023. It's betting that platinum will do just as well.

Spot gold has jumped nearly 30% this year, successively hitting record highs. Its ferocious rally makes it not only one of the best-performing commodities, but also means that metal has

Costco appears to have found a revenue mine with sales of gold bars, as a survey found that some warehouses are unable to keep them on shelves. Bloomberg found that 77% of the 101 stores it surveyed in the first week of October had sold out of the bars,

The Swiss-made bars are only available to Costco members, whose annual fees range from $65 to $130. Made of 999.5 pure platinum, the bars are non-refundable and limited to one transaction per membership at a maximum of five units per order. They are only available online and can’t be delivered to customers in Louisiana, Nevada or Puerto Rico.

The 1-ounce platinum bar sells for $1,090. Sales of gold bars on Costco's website have previously sold out in minutes.

Costco has jumped into selling a new precious metal: 1-ounce platinum bars, according to a Wednesday report from Fortune.

In a striking display of shifting consumer behavior, Costco Wholesale gold bars are disappearing from shelves faster than they can be restocked. During the first week of October,