@ benz
Have you ever tried searching on eBay?
You can find a number of bargain deals on vintage units from US and across Europe...just be aware of the voltage(120 vs 240).Some of them are even universal voltage with voltage selectors. So it's just a matter of switching the voltage selector!
Do you have a brand of choice?
It seems you are more of a Marantz person!
My first starter hifi unit was a Marantz too...PM6004.
I still keep it, as it's a rare breed nowadays....Made In Japan

Most of the PM6004 and all of PM6005 are now Made in China!
Now, Marantz only makes their higher end models in Japan.
PM6004 is good for a moderately efficient 6 ohm nom and above speakers playing in small room. I pair it with Dali Lektor2s with modified crossovers.
Comparing with my other vintage units PM6004 feels like more analytical.
On the other hand, Yamaha feels more smoother in presentation and wider soundstage than Marantz in general. Marantz has a strong presence in midrange, especially mid bass.
So it's a personal choice between two.
As far as amplifier power is concerned, more the merrier!
There's nothing called enough amp power for a speaker...Music is dynamic and speakers are generally very inefficient by design and impedance changes with frequency too.
So an amp must have a very well designed power supply amp section to properly drive and control the speaker and it's ever changing impedance
to produce music effortlessly.
This is one great thing about a lot of vintage amps. They have a very good robust power supply section.
We can see these kind of carefully designed and excecuted power supply nowadays only with higher end models across all manufacturers.