Vintage Integrated Amplifiers With Great Sound

What vintage integrated amps from, say the 70's-80's-90's can be found at relative bargain prices, but provide really good sound quality? 

Not many, what is your budget and what loudspeakers are you driving. 

+1 to @russ69

Without prejudice to his post merits, be also cognizant of the fact the “vintage” just means “old”. Old amps all suffer eventually from unavoidable, necessary, and expensive upgrades for failing capacitors et al. Some units can no longer be repaired today because replacements for failed old model printed circuit boards first introduced back then, are no longer available.

A local tech just told me that he just had two instances of failed “vintage” KRELL amps that now fall into this shitehole for their stunned owners.

CAVEAT EMPTOR: In his words, they are now “ boat anchors”.

Bargain and "Vintage" demand alot of time, $ and skill to bring them up to a level to enjoy with confidence  ...I have restored many a "vintage" Ham Radio equipment, mostly Hallicrafters 1920/30's/50's and early 60's as well as my Scott 299...it is an effort not for the faint of heart...I always shoot for mint + conditions and it is an exceptionally slow and laborious process...

Chassis stripped, parts inventoried, sourcing new parts to replace known failure Components and components identified as suspect...and hardware/silkscreen/paint...then re-wire, re assembly, tune and test...

Is it worth it, for sure...I enjoy brining the old stuff back to life and actually using them...are they as "good" as equipment today? From a sound perspective, I think the vintage stuff just has different attributes of sound, a different caliber of sound...but be prepared for the upkeep and frustration of sourcing parts...

Good luck in your decision