Costco B&M are running a promotion through July 30th: $30 'Instant Off" manufacturer's promotion for a full-size Honeywell 'Enviracare' permanent-HEPA air purifier, $129 at the register. Not sure if this is a regional versus national program, but verified in at least 4 states. This is the best-ever price for a full-size, Honeywell permanent filter purifier: the next-best current price is $158 (Free shipping) from Amazon, or $169 take-away at your local Home Depot. If you're not familiar with them, the Honeywells are the undisputed champs when it comes to bang-for-buck air puri...