I took out the couches in my Spartan and had a devil of a time selling it. I finally gave them to a family who was building a trailer. I was happy to be rid of them and they were happy to get them.
That and the rear patio steps. They were worthless to me and in the way. I found someone who bought them for $75. They happened to be on the route between 2 stops and I handed them off at a truck stop as I was passing through.
These things missing don't hurt the trade in value (may hurt private party resale, of course).
The last thing we sold was a set of theater seats and put a table/chairs in its place. Got decent money for those from a family in Orlando.