ShopRunner offers PayPal members a 1-Year ShopRunner Membership for free. Alternatively, World Mastercard and World Elite Mastercard cardholders can also score a free 1-year membership. American Express cardholders can grab a perpetual membership for free. That's a savings of $79.

The membership includes unlimited free 2-day shipping, free shipping on returns, and more. Some of the vendors that use this service include Newegg, NFL Shop, Saks Fifth Avenue, Under Armour, and Eddie Bauer.