Exclusively for our readers, this American Comfort 13,000 BTU Portable Air Conditioner (model ACW500C) drops from $4583.70 to $449 to $409 at Air & Water with the code BRADS500C, plus it ships free. This is the lowest price we could find on this unit by $40. It is well reviewed, removes excess fluid build up and eliminates the need to drain the unit with AutoDrain technology, has a washable air filter that collects large dust particles and prevents bacteria build up, and more. Plus, it comes with a window venting kit and an exhaust hose. There is no sales tax (except CA).