Costco Wholesale Corporation is an American membership-only warehouse club that provides a wide selection of merchandise. As of 2014, it was the third largest retailer in the United States, in 2015 it is the second largest in the world (after Walmart) and the largest membership warehouse club chain in the United States.
Dec 26, 2019 · Costco Gold Star Membership Deal. Groupon used to feature a one-year Costco Gold Star membership deal with a $20 Costco Cash Card and exclusive coupons. It was a new Costco membership package, (so it wasn’t valid for the renewal of an existing membership) valued up to $144.98.