Shark's self-emptying robot vacuum with a 30-day capacity base is 45 percent off

If you've been looking at Shark's self-emptying robot vacuums, now's your chance to get one for almost half the price. The Shark AV2501S model, which comes with a base that has a 30-day capacity, is currently 45 percent off at Amazon: It usually sells for $550, but you can get it right now for $300. That's only a dollar off its all-time low from Black Friday last year. Shark's AV2501S is a cheaper version of the AV2501AE model that comes with a base that can hold 60 days' worth of dirt.