Rupert Neve Designs RNHP Precision Headphone Amplifier. A good friend who did location recording passed away last year. Knowing Dave, I'm sure he used this thing one time and then put it away. From the looks of it, it appears to be in mint condition. That being said, the power supply is missing.
But it's just a 24 volt wall wort that you need and can readily find on Amazon. Low reserve so that it sells at whatever market value says it should. The item "Rupert Neve Designs RNHP Precision Headphone Amplifier" is in sale since Saturday, November 14, 2020. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips".The seller is "rustybutt_in_alameda" and is located in Alameda, California. This item can be shipped to United States.