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.

Right now, Costco is running a limited-time deal through Stack Social that’s so incredible, one shopper said it seemed “too good to be true.” While you’ll still have to shell out the typical $65 for a Gold Star membership, you’ll now receive a $45 Costco gift card with your purchase — bringing the ultimate cost of the membership down to just $20.

Those who join Costco under a current promotion will have to shell out the typical $65 membership cost upfront, but will receive a $45 gift card approximately two weeks later — bringing the out-of-pocket membership expense to just $20. (Staten Island Advance/Jason Paderon) Jason Paderon