NeweggFlash offers the refurbished Shark Navigator Professional Lift-Away Upright Vacuum in Gray for $59.99 with free shipping. That's tied with our refurb mention from a month ago and the best price we've seen. (It's $10 under the lowest price we could find for a refurb elsewhere.) It weighs 15.6 lbs. and features a detachable canister, 16" extension wand, and 35-foot cord. Note: A 90-day warranty applies, although it's unclear who backs it.
This simple preventive measure takes just seconds to perform.