To give you an example. I found a DOA 434 in my stash, and
because it was so cute, I cleaned it up, fixed a power supply
problem that stumped the original owner, replaced a tantalum
on one of the boards, fixed a really nasty trigger problem,
that was caused by the power supply problem, lubed all of the
pots, cleaned and lubed the panel switches, and fan, cleaned
the attenuator contacts, and did a complete calibration. It
took me a week of evenings to do the work. When it was put on
ebay, as cleaned, calibrated, and guaranteed, it got a couple
of $15 offers, and it remains unsold... as does its twin that
I did in hopes of a better result...
How much did you list it for? The cheapest current listing I see is
for $225. That's just not a good way to sell a 434.
What's the answer?
I think the answer is to take them off the top of the pile and offer
them for sale at something above the scrap value. Don't refurbish
them since that doesn't pay off.