Bought my 47 mm Schneider for $1050 on ebay. Took a couple of months for a pristine one to show up, so be patient. Mine came with a helical focusing attachment which I set aside when I had the lens mounted in a recessed lens board. More importantly, it came with the center filter, that is, a neutral density filter that is dark in the center to balance the light coming through the center of the lens with that along the perimeter. This is pretty much a necessity to even out the exposure across the film sheet and, I think is an additional $200.-
Have used this lens in a limited capacity (Arches in Utah) and my first impression is that it is a little bit of a PITB in that the image is dark (because of the center filter), there is little movement as the image circle is relatively small (barely large enough to cover the 4 x 5 format that I am shooting), and, I keep getting part of the front rail in the photo as the view is so wide. I will press on, hopefully my skills with this lens will improve with practice, I find myself thinking that this might be a great lens for extremely confined spaces or for broad landscapes in which the final printed image is cropped to a "panoramic" view. Definitely a specialty lens.
Charlie