There does not appear to be any damage to the connections. I have included a picture with the bottom off to show the condition of the internal components. Unit does not have a power cord or manual.
A picture of the serial number is also included in case that is useful in determining the age of the unit. The item "Cary SLI 80 Signature Vaccum Tube Integrated Amplifier No power cord or tubes" is in sale since Thursday, July 23, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps".eric" and is located in Spanish Fork, Utah. This item can be shipped to United States.