Hidden Gems in Pre-Owned Solid State Power Amplifiers?

McIntosh MC-352. 

Wadia Intuition 01 is real steal for less than $3k.

After 25 years, I still have my Bryston 4B NRB, along with my Audio Research LS3 preamp. I enjoy listening for several hours every day and I have no plans to replace either one. The cost of what I would consider a marked improvement is more than I can shell out right now.
After 21 years, the Bryston did develop an issue. I took it to my dealer, Audio Advice, and it was shipped to Bryson. They repaired it at no charge, even though it was a year past the warranty period, and even paid the freight back. That is customer service.

Sumo Andromeda, Meitner 101, Belles 450, Accupahse P300

Yamaha MX-1 and MX-2 Power amps.  They perform flawlessly down to a speaker impedance of 2 ohms and came out at the peak of 2-channel stereo era before everyone started to make surround sound integrated amps.