Dynakit 70 Stereo Question

DONT PLUG THEM IN! They need some care before powering up on a Variac. With that said, look around for Dynaco ST-70 to get an idea. These are great amps but most likely will need restored. You could get anywhere from $200 to $700 each depending on condition.
As Jjrenman said, the tubes could be worth a bundle. If you take these in for service, don't let them keep the tubes if they tell you they are no good...

The amps with cloth-covered wire on the transformers go for more. Otherwise the chassis must not be rusted.

These amps have plenty of bandwidth and fixed up properly will give any Mac or tube Marantz a run for its money. The output transformers in the ST-70 work very well.

The amps can be monostrapped, doubling the output power. Instructions on how to do so are in the ST-70 manual.

Two Dynakit ST70s in your attic are a real find! If you choose not to keep them, they'll certainly fetch you a nice windfall on a site like Audiogon, ebay, etc.

In my opinion, the ST70 has superior tone to the vast majority of amplifiers, tube or solid state, marketed today. Of course, they're neither the last word in power nor bottom-end, but there's a couple novel and dirt cheap methods to bring the latter up to modern standards. In the end, I feel the ST70 is one of those products that shows how far off the road high-end audio actually wound up.

If the condition of the chassis are not to your liking, you can always purchase new polished stainless steel units for about $125 at http://www.dynakitparts.com/
Kevin, does a phenomenal job with the polish. His previous iteration was great, but since going to a new method about two years ago, he's taken it up maybe two more notches. Outside of tubes, he obviously also sells anything else you would need to get your amps back to where they need to be.

As in life, condition is everything. If you sell, but sure to make no representation as to functional or operational condition. If an e-Bay sale, safest to say sold as parts only. If stored in an attic, the temperature would often be of the extremes, making condition very problematic. As for sound, I have knockoffs of the design and they are great sounding amps.

Thanks to all for taking the time to respond! Your great comments, suggestions and insights are very much appreciated. Now I have some thinking to do...maybe a new hobby.
DenverMax