Incorporate Dynacos into my system, or sell them?

I primarily use my stereo in my home office. I presently have two separate systems I'm using:

For intimate listening -
Eastern Electric Minimax CD Player
Audio-Technica Sovereign ATH-W1000 headphones

For general listening -
Olive Opus RWA-modded Music Server
Red Wine Audio Signature 30 amp
Omega Super 3 XRS speakers
SignalCable Silver Resolution Reference ICs
SignalCable Ultra Speaker Cables

Sitting unused in my attic are -
Dynaco Stereo 120 Power Amplifier
Dynaco PAT-4 Preamplifier
Dynaco FM-3 Stereo FM Tuner

Are these Dynaco components dinosaurs? Can they be constructively incorporated into my present system in any capacity, or are they too archaic to even consider? I'd hate to sell them off, only to find out I could have used them to advantage with my current setup...