After using the automatic Polaroid 250 for a while I stopped wanting a 195. Since the type55 is no longer available, even with very good metering technique, you still will wind up with some element of bracketing by trial and error to get perfect exposures. So I figure I can go back and forth with minor shutter speed and/or f-stop adjustments on the 195 or just tweak the LIGHTER-DARKER dial on the 250.

To answer your question, I think the only place you will get a 195 for a "reasonable price" is from a garage sale or possibly Craig's list if the camera is in a box with a bunch of plastic cameras.