Hidden Gems in Pre-Owned Solid State Power Amplifiers?

The KBA75 that tweak1 mentioned for sale was probably mine.  I rebuilt one myself and sold it just a couple of weeks ago.  This is truly a gem of an amplifier.  It has a warm delicate nature, yet still very good detail. The buyer gave feedback that the amp is outstanding.  
Another old amp if properly rebuilt that is Equally good is a Sumo Nine.  Beware without the boards having several parts replaced,  it will not be in the league of the KBA75,  but when updated with quality parts,  this old amp is Excellent.  A few last amps that you don't see mentioned often is a Muse One Hundred Sixty,  Followed by a Muse One Hundred. I Also rebuilt an old Heathkit AA-1600 from top to bottom. Never hear anything about this old amp, but also Excellent.  As with old amps,  at a minimum power supply caps should be updated and most likely much more.  

@roberjerman I have a Bedini 150/150 and a BEL 1001, among others in my collection. Both still working fine! 


No Buzzzzing?    
Sweet!!

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

Perreaux 2150B. 340wpc/8ohms, 680wpc/4ohms, 920wpc/2ohms! Can be found for around $1K. I have one! 

Belles and McCormack with higher-level mods — beware the older models input boards are beginning to fail and need to be replaced. I know this because I have one that needs a new board, and it’s an expensive repair.

True. I had a beloved DNA-1 Deluxe that I used for about 20 years, until it died. Caps or boards fried, and it got REALLY hot, POP! and then one channel failed. I was going to have it totally rebuilt (basically everything replaced, better than new) with the Gold upgrade, for about $2000. It’s a classic amp, but I decided to have Klaus Bunge at Odyssey Audio build me a Khartago++ for about $500 less, and it’s a great bargain amp (Jonathan Valin of Absolute Sound loves them as monoblocks, calling them a fabulous bargain).

I loved my McCormack, and Steve Mc is a brilliant designer. I would love to have a new DNA-1 Gold, top of the line upgrade.