Hehe yeah, bulk film backs are basically pointless these days with digital being a much more sensible choice where for what ever reason you need loads of shots but can't change a film ... I can't even think of an application for one!?
I also have the md4 auto winder which is a beast! And the wonderful "high point" finder ... Although the little button on the HP the lights up to show you what aperture you have set is a little on the ropey side and doesn't always work ... Its the one camera out of my nikon collection that I consider part of my regular used kit ... Absolutely love the thing! Im so excited to be finally getting a waist level finder for it! I'm going to go out with it and the 135 lens and get some street photos I think!
There is something odd about framing with a waist level that gets my composition better (I have the waist level for my f4 too although don't like the f4 particularly so use it very rearly) I think it's the fact that you see more of a finished image in what your looking at??
As an aside, I thought this thread might be a nice place for other people to share their happy eBay finds!?