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? 
4425
Lol.  Most of the mentioned brands I had when I was a teen. The worst was York.
It seems that anything I buy fits the bill. First Snell, then Threshold, then Dunlavy, then Classe. The list goes on.
I was disappointed with what I sold my Manly Labs 300 Neoclasic preamp for,and how long it took to sell. I did get it at demo price but it still stung when I sold it. What I replaced it with ( not going to mention a name) I purchased used. Funny thing if I were to put my current preamp up for sale right now I wouldn't lose a dime, and it's not a mainstream brand.
Happy Listening
Mark