A few years ago, I "flipped" my Magic Girl spot for $23,000 and I was vilified for it. Iceman44 concocted and slandered me as being a shill for Jpop and the gullible Pinside mob happily piled on.
We are all here to make or at least keep as much money as we can. That's just smart personal economics.
Some people are incapable of looking inward and simply jealous when others do it better or in a different fashion.
Good luck with your sale.