Help with older gear

My sister's father in law is looking to sell his system. He bought it all around 1987, but it seriously only has a few hundred hours on it. The components have never left the rack in 25 years, so they look pristine (at least from the front. I haven't taken anything out yet). The amplifier has been directly under a large fan system that always kept it cool.

The gear:

Preamp:
Krell KRS2 (and KRSP-2)

Amp
Krell KSA80 Class A

Tuner
Accuphase T-107

CD Player
Accuphase DP-70

Speakers
Wilson Audio Tiny Tot. There is a "2" on the back, but I'm not familiar enough with the Wilson line this early in their history to know if there was a WATT 2 in 1987/1988. Could this be a WATT 2?

Subwoofer
Entec LF20

Nakamichi Dragon cassette

The gear really does look great and you'd never know it was 25 years old. Anyway, is there still a market for these pieces? I'm guessing the Krell gear still has somewhat of a market, but I don't know if the Accuphase does. I know plenty of people interested in the Dragon, so that's answered...

Since the amp is 25 years old, I know the first thought would be replacing the capacitors, but if this amp wasn't ever even used for 1000 hours, is it more age or usage that would require the capacitors to be replaced?

Anyone else have any thoughts? What if you were asked to try to sell this stuff? Anything I should look for that I haven't mentioned?

Thanks for any help...