I knew a stripper once that told me "When I work I prefer to be paid".
Same goes for any business. No net profit = no longer open.
What many audio guys object to is that their beloved item they paid $20,000 for 10 years ago is now worth $2,000 to a re-seller. It's hard to take the L on stuff you "invested" in but the free market cares not a whiff about your feelings.
TMR purchase pricing is generally 1/3 of MSRP if it's MINT. Any flaw drops the price further. They also have learned what item sells fast (McIntosh for example) and what items sells slowly (formerly expensive not well known speakers for example) .
You can generally get 10% off their asking price- but you have to ask.
Alternatively you can try to retail it yourself. You won't like the reality of the market's imposed valuations. If you have an ego problem you will be miserable selling gear. Buyers are in control here and the universe of buyers is shrinking. That means more competing items for sale and lower offers.
If it flys, fornicates, floats or plays music- lease it. LOL!