Hidden Gems in Pre-Owned Solid State Power Amplifiers?

Reference Line Audio Silver Signature. Owned one for 20 years and it's still the best solid state amp I've heard.

I still have a Reference Line PreEminence One passive line stage, and it's amazing. I can't bear to part with it, though it's not being used. I suspect it's like the Tortuga passive, which gets great reviews.

I'd heard his amps were great too. I cannot find anything about the owner of the company... it's like he vanished. Did he die?

 Harman/Kardon Citation 16.

Effortless power. There are a few very affordable upgrades that be done to make them even better. Under a thousand bucks for a good one as well. 

Nice thread. I will be in the market for one in the future. 

A lot of recommendations without any concern for what speakers will be driven (and their sensitivity, impedance, & phase angles) and the preamp/dac that will do the driving (and whether there will be an impedance mismatch between it and the amp)...

Also, plenty of amps are up for sale because of upgrades. People do buy more expensive models from within the same family simply because they love the sound and want "more of it." And some people end up with speakers that don’t match amps they love. I had to sell my Coincident Frankenstein 300b monos for that reason. It’s a lot easier to move an amp than a pair of 300lb speakers. Finally, ears and systems work differently and something that would sound terrible in one situation can be another person/system’s dream amplifier... usually because of problems in speaker/preamp matching.

I first started researching the older models of the Anthem MCA 20, 30, and 50 series of amplifiers but then just the other day I stumbled on the Anthem Integrated 2 Preamp (that I had never heard of) selling for less than $700 and later found out Part Connexion does rufurbs of Anthem products. Although it uses (2) 6922 vacuum tubes I think the Anthem Integrated 2 Preamp is going to be my head unit new toy.