What else is in the box? A lot of original paperwork. The yellow-covered 49 page Apt Holman Preamplifier Owner's Manual, which has been praised as the way all owner's manuals should be written. It's a work of art.
And it's all in English. The inside back cover has a schematic of the unit, and just in case, there's another schematic pasted on the bottom of the pre-amp and signed by both the guy who inspected the unit and the guy who tested the unit. A four-page owner's manual for those who can't wait to read the 49 page manual. An Amplifier Owner's Manual.It's 34 pages plus a schematic. I'm not sure why you'd need this manual. You just plug the unit in and hook up the cables (not included).
This booklet is also in English and doesn't insult your intelligence. A two-page spec sheet headlined Guaranteed Specifications. A "test report" for each unit, signed by the guy who did the testing. These units have been in the family since new (owned by my cousin Michael Brinn, until recently a jazz pianist in West Palm Beach, Florida).
The actual cost will depend on how far you're located from zip code 06470. The item "Apt Holman Preamp and Professional Systems Engineering 2 Power Amp" is in sale since Sunday, September 8, 2019. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "ninetyfiveninetyfive" and is located in Newtown, Connecticut. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.