Brands that have the least depreciation

I’ll say Ascend Acoustics for sure. Not so sure you would consider 3000 dollar speakers ’high end ’ or not.. You rarely see them for sale. I listed a set a set of Raal Towers on AVS forum @ 5 o’clock in the evening. In the morning when I got up, 6 buyers were waiting in line to buy them. The one I let have them put in dibs one hour after I listed them ... And contrary to what someone said on here, they put zero in any type of advertizing.... I just wish they made a tower " on steroids "

From what I have seen lately I would say McIntosh is at the top of this list 

McIntosh for sure.

I'd add Totem to the list....many after the 1st year 50% drop they remain pretty much there.  Some classic models like the Mani 2 have barely lost resale...or increased !

I say Bryston, you rarely see anything on the used market.