I still think the closest thing to it that I've seen was the Ruger Hawkeye.
As for the price, I didn't get a phenomenal look at condition, but in the few moments I stared curiously at it, it sure looked like it was very well kept and IIRC, the price was nowhere in the neighborhood of that $3,500. I believe they had it tagged around $1700. Of course, this may be a much later one. As I said, I had never even heard of these before, but you glance in a case and see a revolver... with a completely flat "cylinder" and you kind of do a double-take.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.