Old SS amps

I love my carver stuff.the 500 is on ferris buler day off movie.i have nelon audio refresh them.epic and enjoy the music.he puts blue led in the meters and they think there mcintosh.

OP

20-year-old amps, as other have posted is just at its prime (as long as it is not abused). If it's a Pass, then it can be recapped if you wish at the factory.

I would grab that offer (if it's a Pass) right away assuming the price is right

My old amps were Rotel and one of the first Decware amps. these were about 20 years to this day, and they all sounded great, no need for CAP changes. 

@devinplombier 

Any idea how long this is? so It’s a good idea to turn them on every once in a while.

Should probably get rid of the stuff in the boxes if I’m not gonna use it. 

It's nice to know solid amps just like us the way they self heal.  Self healing is underrated. Pretty incredible.

@emergingsoul 

Manufacturers of electrolytics usually say shelf life is 2 years but it depends on storage conditions, mainly temperature. It's generally accepted that the rate of electrolyte degradation doubles every 10 C increase. In addition, high humidity causes lead corrosion. Climate-controlled storage is pretty critical.

Personally, I would restart anything that hasn't been turned on in a year on a variac.

A variac is absolutely the way to go if not sure about caps, you can reform then through a process of starting off with low voltage and increasing in steps. Also, I'd open up and visually check every cap, look for leakage, swelling.