The gold bars for sale at Costco are marked about 2%–3% over the spot price of gold, undercutting the premium charged by traditional gold dealers, who mark up gold prices between 1% and 30%.

Costco. “They love it so much.” Costco stocks far fewer items than most giant retailers but lures shoppers with low prices on high-quality goods, retail analyst Neil Saunders said.

Amid an unstable stock market, investors have been driven towards one of the most stable investments out there: gold.