Harman Audio offers its factory-refurbished Harman Kardon 500-watt 5.1-Channel Home Theater Receiver with AirPlay, model no. AVR 1700, for $180 with free shipping. That's $280 under the lowest total price we could find for a new one. It features 100 watts per channel into five channels, six HDMI inputs, Dolby TrueHD and DTS-HD Master Audio decoding, and AirPlay support. A 1-year Harman Kardon warranty applies.