Harmon Kardon ST-7 with Rabco Tonearm

A friend gave me one of these today. It is all brushed aluminum, made in the United states and looks to be from the 70s or 80s. The tone arm is one of those tangential ones where the whole arm moves from outside-in, perpendicular to the record plane. It needs some cleaning and perhaps a new power cord and RCAs. Other than this I do not know too much about it. Was it a good record player in it's time? Is it worth fixing up? Looks pretty solid overall.

Thanks!