From: Evan Koblentz
1. How rare/valuable is the item?
Moderately rare, not very valuable.
2. What else might be inside the package?
Nothing - it's clear shrink-wrap around a loose-leaf manual.
3. Will opening it cause any damage?
No.
4. Can you store it in a suitable way after opening?
If I open it, I plan to store it in an original DEC three-ring binder.. :-)
From: Fred Cisin
OTOH, if you want to SELL it
When it comes to me and PDP-11 stuff, 'cold dead hands'! :-)
Noel