Costco's jumbo-sized gold bars weigh as much as three and a half standard coins, and the quick sellout shows just how strong demand still is.

A 1 oz. 24-karat gold bar from South African company Rand Refinery or PAMP Suisse cost about $1,950 and $1,980, respectively Kimberlee Speakman is a digital writer at PEOPLE. She has been working ...