I bought a used cable from them and felt that the price was about 15% higher than I could have bought it from a private party had one been available, but one wasn’t. I bought the cable and felt it was a reasonably fair purchase.
I then sought to trade a pair of class D amps in on a class A stereo amp from another manufacturer. On the Class D amps, they quoted me a price that was barely over 50% of what the amps were bringing on the open market, and the price they wanted for the stereo amp was about 40% higher than they were bringing on the open market. The upshot was, if I had done the deal, I would essentially, in a financial sense, have given them my amps for free. Needless to say, I passed.
I was able to pretty easily sell my amps and buy a stereo amp at market rates.
I will be very reluctant to seek to sell them any used equipment in the future based on this experience.
I understand they are in business to make a profit and have overhead, while private sellers do not. But, I’m not willing to give my equipment away.

