Vintage receivers???

Well John the Marantz 240 should make a fine amp for you to to recap and refurbish.  If the work is only a matter of caps.  The bigger problems are the integrated circuit boards.  If they are bad you will be out of luck.  Remember that older amps frequently had less power than you would anticipate seeing now.

This is generally the wrong forum to discuss vintage equipment. Check out Audiokarma.org. 

I am not familiar with the Audiokarma site.  I have used this and Audio Asylum. Do they have a vintage discussion board? Or do they have multiple vintage bulletin boards, and how are they arranged?

Buying a vintage receiver is buying nostalgia. The biggest problem is the large markup on that value. Plenty of newer better equipment at a lower price without the nostalgia tax.On the other hand, finding one dirt cheap and rebuilding it yourself could be a great deal of fun. and bring happiness.

I’d say the 240 is a horrible choice if you’re looking for a unit to learn on. The gigantic caps in it aren’t cheap. It’s full of unobtanium transistors. And most importantly, you NEED a bench full of gear to properly adjust one. They’re prone to oscillating if not properly dialed in. I’ve read a few stories where experienced techs have dug into 200 series amps to do simple work and end up with 500mV at 250kHz on the outputs or something like that and no clue why.