Brands that have the least depreciation

 One brand that does not seem to hold it’s value that I don’t quite understand is Concert Fidelity. In particular, the preamplifiers and amplifiers are superb reference level pieces of equipment. I am not sure if it is the lack of name recognition or advertising?

If I was in the market for second hand equipment, I would only consider brands that service their retired equipment in house.
On the other hand, look at the money early, Japanese, solid state is pulling in now.
What will the download generation crave?

Definately B&W Loudspeakers,AR,Classe,Mark Levinson,Perreaux ,Klipsch, & Magnepan just to name a few . I would not touch McIntosh, Wilson, or ayre with a 10 foot pole. This is just my opinion.

I'll mention two not said so far... Wilson Speakers and conrad-johnson electronics.  I've had good resale and trade in experience with both.