Is my Dynaco Stereo 400 worth repairing for resale?

How much do you like it? How much would it cost to replace? How long do you plan on keeping it?

If you get all the electrolytic caps replaced, along with any other out of spec part, the amp should last another 20 or so years with out issues, other then cleaning. 

If you love it, fix it, if not sell it for something you will love. 

In the last 6 months have referbed 3 of my amps, and 2 of my pre-amps. All sounded so much better after, it was way more sweat equity over cost as I DIY'ed it. Cost was about $80 per piece, sans the amps big power caps. 

@curiousjim 

I get there is little room inside, however, all new caps of the same value will be much smaller. At times I have had to check the values again, they are less then 1/2 the old caps size for the same value. In fact have gone up in voltage on a lot of caps, they are sill much smaller. 

Point it, there should be a lot more room, after you swap out a few caps. 

Yes, do not purchase any "kits" get the service manual, it should have a parts list, with that, put together an order with mouser or digikey.

@curiousjim 

LOL, fancy caps. Well, I used audio caps (Nichicon Muse ES, Gold) for the signal path, and regular caps for everything else. Also replaced all carbon comp, and fuse resistors with metal film. 

Yes, it made a very noticeable improvement, everywhere! Bigger sound  stage, lower noise floor, cleaner sound, more bass, more high, cleaner mids, more dynamics. Like a vale was lifted. 

Also have a spare pre-power amp set as a backup, switched it back to back with refreshed vs original. The refreshed is just so much better. 

Like I said, cost was nominal, my time was vast. Think my pre-amp took 12 hours over a couple of days. Power amp was like 18 hours over a few days. Replaced over 100 parts (caps, resistors, diodes) in both units.