here is a more detailed description of item #2:
The Negatrans is not a particularly hard to find item. There were versions for the 23c (that also could be used on the 45) and one just for the 45. An early version was "square" ; later versions had angled corners.
I think the one for the 45 is in slightly less demand; as Beseler 45 users are typically shooting larger formats.
There was a 120 negative version that is probably more valuable IF it has all the pieces. It used a glass pressure plate that often was misplaced or scratched up.
The Negatrans relies on a long rubber O-ring to advance the film. Replacements are available (both OEM and generic). As you turn the wheel (upper left in your photo) the rubber ring contacts the edge of the 35mm film strip and moves it back and forth.
You should be able to visually verify that the o-ring is present and it's condition.
the version that fits both could be found on Ebay for $10 with free shipping - but that is rare. Plus it was missing the posts on bottom that help keep it in place (nice to have, but not absolutely necessary). It has a good O-ring.
Doug
Here is a image of the other side of this item: