I'd sell it here, or on Craig's List, or wherever.
You'd be surprised how many people have an old system with just one failed component which they need replaced to get things going again. You're doing them a favor by offering it. You're helping the
environment by not trashing it. If you make a few bucks, that's just gravy.
I had a JRC 1800 once. It was still going strong at 10 years old when I
sold that
boat.