Why is used audio equipment so undesirable?

When I was younger and had less money I bought used, from a dealer. As I got older and my purchases were much better thought out and expensive I would keep a component for ten to twenty years. For instance I bought a new Pass x350 and traded it in 15 years later for $500 less than I paid for it… final cost $2.77 / month. What a deal.

So, first. Having a dealer that accepts trade-ins is important. This gives him the opportunity to give you a “discount” from MSRP under the guise of “trade-in”… that does not violate their agreement with the manufacturer. My dealer got out of the business of reselling… he gives it to a third party that resells on the internet.
 

Having a long termed relationship with a dealer is useful as well.

My tastes have always been greater than my budget (new prices anyways).   Like many audiophiles I research gear, check user comments and reviews and try to pick gear that I feel provides the max bang for the buck so to speak and has a good potential for meshing well with my other gear.   Used gear or factory direct is my go to given I do not have deep pockets.  

The Op's assertion is so stupid that I don't believe that it was meant for any reason other than to be provocative. I almost always buy used and have had great success selling used. If you don't do well selling used, it is usually for one of two reasons.  First, the piece is not popular with potential buyers, or second, it's an obscure brand which may be wonderful, but buyers shy away because of potential problems with having it serviced as well as lack of professional and user reviews.

Just a ridiculous thread.

I have been buying used since what I guess I would say is upped my game.  I cannot afford this level of a system without buying used. So far so good. 

There's always market for buying and selling quality used components, do your research and purchase correctly. Without a thriving used market, audiophiles would be far fewer in numbers, leave it to only exclusive membership. And I've never had a single issue that wasn't promptly resolved, and same on my end. I've had more issues purchasing new components from  certain retailers.