Yeah, it's a little low, but I'm willing to pay a little more than 550 and the lenses don't have to be PS. It seems like recently all the Bronica gear has disappeared and all thats left are kits for $700+ on ebay.
I know exactly what you mean! When I bought my SQAi gear not more then 2 years ago, there was plenty of it around - even the odd new lens or two. Now there is hardly anything. Is it all dying?