My father bought one new. They were made from '77-79 and I ran around $700 or a little more new.A few years ago, it died and he replaced it with a Denon. He said I could have it if I got it fixed, but I never had the money and when I do, I just forgot about it, so I gave it to my mother who could use it.
My uncle gave me some Infinity Column II's he paid around $1000 for in the same era. It sounded unbelieable through those speakers. The detail of the amp was very good, as was the tonal balance. I think it without a doubt sounded much better than his new Denon. I forget the model number of the Denon as it would be nice to know what it is being compared to, but when it came out it was supposed to be the same quality as the $1000 models at the time (2002 or so).
Good amp! And you can get them for $150 today.