In November, Costco fans found a limited-time deal on Stack Social, which offers the brand's usual $65 Gold Star membership. However, with the deal customers also get a $45 Costco gift card to use during their first shopping trip, which brings the membership price down to just $20.

Some professions qualify for credits when they sign up with Costco. If you're not one of them, find out how occasional new member promotions can lower your fee.

Having a Costco membership opens the door to discounts and deals — but the $65 annual fee stops some from signing up. Now, however, eagle-eyed budgeters have spotted a deal on Stack Social that offers Costco’s Gold Star Membership with a $45 gift card to use during their first shopping trip,