Brands that have the least depreciation


Which high end brands have the best resale values? 
goldenear1948
From what I’ve seen, Harbeth and Proac speakers will always hold their value.
Denafris Terminator Dac was sold at 4200$ last year.

Now the price got jacked up to 4,500$.

I found that used one listed at 3,700$ (US Audiomart)got sold within a week.
Like many others have said, McIntosh definitely does well in retaining value. 

What is low depreciation?  If an item is 5 years or newer and sells for 60%.... or 6-10 years and sells for 50%... or 10-20 years and sells for 40%... would these items be considered low depreciation....what do you think... what might define “low”?