M.R.
How about a living estate sale?
Or consignment at a higher end type consignment store?
Compare what the split is and go from there.
You are right though, you won't get what it's worth 2nd hand. I picked up a used Knabe Grand Piano, for free, and had it refinished for $2k. It's worth over $45k. And I have a Henredon sofa from a nice consignment shop for $400. Brand new it's at least $10k.