Quoted from LadySlingshot:
Just list it for sale like normal. What kind of BS are you expecting? And if people lowball you, just say, no thanks. It's just a pinball machine for sale, not king tut's sarcophagus.
The kind of messages this seller quoted as "nasty and scathing" - https://pinside.com/pinball/forum/topic/for-sale-americas-most-haunted-spooky-pinball-2014-2018
Pinside can be a very unpleasant place to sell games, I personally try to keep my sales as low key as possible. I anticipate the first game listed for sale of something incredibly rare to quickly go viral and spawn the hate of many toxic community members.