Deal: Panasonic GH4 w/ Interface Unit for $1697 January 5, 2016 By Eric Reagan B&H has the Panasonic GH4 with the YAGH Interface Unit that provides XLR inputs and SDI output for $1697 (reg. $2297). Check it out here at B&H Photo. The Panasonic GH4 body is also available on its own for $1297 (reg. $1497). Check it out here at B&H Photo.