One option to purchase a Costco membership is by talking to a representative in-store. However, you can get a $10 Costco Shop Card with a Gold Star membership or a $20 Costco Shop Card with a Gold Star Executive membership. Just sign up here. Another great way to save on a Costco membership is to wait for a sale on Groupon where you could potentially get a membership for $60 with a free gift card and extra Costco coupons!