Sales of the one-ounce bars are limited to two per membership and sell out "within a few hours."
Galanti said Costco also sold a card autographed by baseball legend Babe Ruth for $20,000.

Gold bars continue to be a hit at Costco.

The company sold $100 million worth of one-ounce gold bars in its most recent quarter, CFO Richard Galanti said Thursday during an earnings call.

When asked what consumer trends Costco was seeing this holiday season, he quipped, "They're buying gold."

Galanti previously said the company sells out of its gold inventory "within a few hours" of the products being listed online.