This is a nice high-quality HP Deskjet 520 black-ink printer.  It has a full set of buttons on the panel, unlike the late 90s HPs.

This includes the power supply.  It has been tested to print a test page, but the ink is dry.  The printhead moves to the center and back again when toggling the "Change Print Cartridge" button, but no further testing has been performed.

This includes a new print cartridge, but it was stored for many years, so may no longer work.  Consider it a bonus if it does.

Condition:  This unit is not fully tested so it is being listed for parts/repair.  It has yellowing and can use some additional cleaning.  The plastic is not brittle, and it appears to be complete.  It powers up, the printhead moves to the center when the door is opened and moves back when it is closed.  It attempts to print a two-page test print when the Self-test button is held in, but the ink is dry so the page is blank.  However, it draws the paper in and advances as expected very smoothly.