As one of its daily deals, Amazon offers Prime members the Black & Decker Space Maker Traditional Multi-Purpose Can Opener, model no. CO100B, for $20.49 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.39) That's the lowest total price we could find by $20. It features a power-pierce cutter, bag cutter, bottle opener, and knife sharpener. Deal ends today.