What brands tend to have the worst resale value?


I couldn’t resist this topic which obviously contrasts with the post on the other side of the equation.
In all my years buying and selling gear I think that Soulution gets hammered more than anything I’ve ever witnessed. I’m sure it’s great gear so there’s something that I’m missing. Mola Mola looks tough as well. Late generation Krell pretty weak too. 
What are some other candidates? 
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seanheis1, 

One of the many contributing factors that  has influenced the more traditional home audio solution is the home theaters in a box, sound bars, and the big sound Bluetooth speakers.  

I think some of the well designed  “vintage” gear can outperform the more modern equipment.  

Occasionally when family and friends ask me for audio equipment advice.  I usually recommend that they consider “vintage”equipment with the suggestion that they have it serviced.  
Emerald Physics. I have a great sounding pair, that short of giving them away,I can't seem to move.I have even greatly reduced the price to no avail.
Soulution  gets hammered so low because the mark up is crazy so high your talking Italian sports cars prices . You can not drive your power amp to work .
Keep in mind that it's not uncommon for the original buyer to get 15 - 20% off MSRP. So in reality, some brands are doing better than might appear.