ShopRunner offers PayPal members a 1-Year ShopRunner Membership for free. (Not a PayPal member? It's free to join.) That's tied with our mention from three weeks ago, and at a savings of $158, it's the best offer we've ever seen for a ShopRunner membership, excluding the mention below.

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.

Are you an AmEx cardholder? You can get a perpetual membership for free.