Update: Deal over.

Shark Air Purifier 4 True HEPA with Microban Protection, up to 1000 Sq. Ft., Captures 99.98% of particles, allergens, viruses, smoke, odors to 0.1–0.2 microns – Link

Amazon has this on sale for today only, for just $229.99 w/free shipping!

This was selling for 349.99 and is now its lowest ever on Amazon.

• 4-FAN AIRFLOW: 4 high-speed micro-fans work together to evenly distribute airflow across the filter.
• ULTRA-FAST MEETS ULTRA-QUIET: Four high-speed fans provide a remarkably quiet clean, and an incredibly fast clean air delivery rate.
• TRACKS & ADJUSTS AUTOMATICALLY: Clean Sense IQ tracks air quality and auto-adjusts power to constantly maintain clean air in your home. The easy-to-use control panel displays data in real time.
• ANTI-ALLERGEN HEPA MULTI-FILTER: Shark’s NANOSEAL Filter with true HEPA captures 99.98% of large, small, & micro-sized particles (based on IEST-RP-CC007.3, 0.1–0.2 microns).
• HEIGHTENED ODOR PROTECTION: An advanced odor guard on the filter protects against household odors from cooking, cleaning products, and more.
• LARGE CLEANING AREA: 4 fans working together generate the power to purify up to 1,000 square feet (Based on one air change per hour).
• TREATED WITH MICROBAN: Microban reduces bacteria growth on the HEPA filter surface. Microban antimicrobial product protection is limited to the product itself and is not designed to protect users from disease-causing microorganisms.