From what I hear everything Auditronics made was state of the art, hand built by engineers who LOVED what they did.
Complex board to learn yes, and, if it breaks, well, Auditronics isn't in business anymore so parts will be a bitch!
But that being said, an amazing piece of equipment. Made here in Memphis at the time of their hay-day, a voice talent I work work with knew one of the dudes behind the company back in the late-late 60's through the 70's. The board is outstanding in sound! Compared to Neve and SSL easily.
I would snatch it up quickly, and take it to the nearest pro electronic shop to give it a once over, and hopefully, get it refurbished.
Even if it is broken beyond repair, you can still strip it down and sell the strips on Ebay for like $100 a channel.
Feet Kick ASS!!