These are Silverfaces and these prices seem fine. I "think" I remember paying about $700 for my 1974 a couple of years ago. Mine also had the blackface conversion done. I spent another $300 or so to have it worked on (new Weber speakers), tubes, bias, etc by Scooter Barnes here in Denver so my total outlay was around a grand but it was worth it. This amp sings. Really sings. Anyhow, could it be that you've been seeing blackface supers? They are harder to find, older, seemingly more desirable and I do believe those go for $1200 plus. Just a thought. That's why i went with a silverface. Cheaper at the start and EASY to turn into blackface.