There's someone in Montana who advertises on eBay that does restorations of older Sansui amps. The service is $350. I have never used him and I can't vouch for his quality or timeliness, but it does give you a point of comparison.
sansui au 717 integrate amp
I have a sansui au 717 integrated amp that needs repair. My repair shop told me it would cost about $350.00 for repair. New caps and labor. This is from the 70s era. Is it worth it to restore for music listening or should I let it rest in peace ? I am not a super critical listner. Just enjoy listening to music .