I have doubled my money on McIntosh gear, after enjoying it for a few years . Kind of like Ferrari, McIntosh will always have people who will buy what they want, regardless of cost, maybe for nostalgic reasons, maybe status symbol....who knows but both have little depreciation and generous appreciation once they are a certain vintage.
I buy to hopefully achieve better sound, at this point I really don't care about the resale. As I write , I'm sitting here listening to my system.... it's never sounded better. So good I'm afraid to touch it.,. My latest toy, a Zesto Leto preamp has really enhanced my system, like next level realism. I got a great deal, the resale is irrelevant to me . It will probably be the last preamp I buy.