Pioneer SX-780 (supposedly recent BNIB) would you still worry about STK-0050?
So I'm looking around and I see there is this cosmetically perfect looking SX-780 that the seller says it was sold to him as "BNIB when I bought it and has been used rarely since ." Priced $700. It looks cosmetically perfect all around and he has the box and foam pack that it came in. The box is rough looking. The speaker spring terminals look new, no sign of wear on the back panel etc etc.
For the sake of argument lets say it really was a BNIB. Are the Darlington packs still problematic if not used? I've read that their wear is thermal so...
Thank you for your thoughts and advice.