Proton 1100 Stereo Preamp


Hello, I wonder if someone here can give an opinion if the vintage preamp has any value.
It is hard to get it to turn on, I was told it is a cold soldering problem somewhere.

Is this an item for Goodwill or what can I sell it for?
Thankspuu
puu
Item for Goodwill.  Not what I would call vintage (late 80s, early 90s).  Owned several Proton pieces over the years, from amps to CD players to tape decks to table radios).  Nice performers, until they die.  They all die soon enough.

Rich   
Thank you so much, a good idea to look there.I do not see SALES under topics,  where do I find the sale section?
Looks like they go for around $100-$150 on the completed/sold listings on the big auction site.