Staples cuts 30% off select air conditioners and dehumidifiers via coupon code "25271", yielding prices starting at $48.82. Plus, all such orders qualify for free shipping. Deal ends August 2. A few best bets, with prices after coupon:
Amazon offers the Honeywell QuietCare 9-Gallon Output Console Humidifier, model no. HCM-6009, for $69 with free shipping. That's the lowest total price we could find by $46. It features a 3.4-gallon capacity with a 9-gallon-per-day output, adjustable humidity controls with three moisture settings, and and Air Washing pre-filter which traps dust, dirt, and pollen.