Put me in your will if your kids don’t want it. That is one bad assed receiver. Acoustically I still prefer my 2020, but that is one party machine. You can throw a breaker with one. Raw power. GTO kinda power. Most of that 80 lbs is transformers.
BTW, get it serviced. It is worth $1500+. It is like grandma’s jewelery.
I never knew they made one that big. I still have my SX-780 that I bought around 1978 - primo condition and in the original box. I’ve got several stereos that I bought over the years and tried not to part with anyone them except an old 8-track I got in 1972 (still have the speakers though, I think).