Walmart continues to offer the Honeywell True HEPA Air Purifier in Black, model no. 50255B, for $99.99 with free shipping. That's tied with our mention from last week as the lowest total price we've seen. (It's also a current best by $50.) Designed for rooms up to 390 square feet, it features a true HEPA filter, three cleaning levels, and 360-degree air intake.