I often grab this self-emptying Shark stick vacuum over my Dyson. Its on sale for $399.

SAVE $100: As of May 16, the Shark PowerDetect cordless vacuum cleaner with auto-empty system is on sale for $399 at Amazon. That's 20% off its MSRP of $499.99, and just $50 shy of its Black Friday price.

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Credit: Shark ...