I don't know how many of these are in existence. I've only been hunting for it for a few months now but from word of mouth, it's hard to get these complete with box. Not so tough getting a complete 4 car train set [no tracks, electrical transformer, little figures, pop-up buildings, or play mat].
If I open it, I feel that it may be, in a way, destroying probably one of the very few MISB in decent condition sets there could be [nearly 25 years old].
So it's sort of a moral dilemma. On one hand I could be selfish and open it because I can, and I like opening new things and this is the ultimate find for me. But on the other, I could just wait till I find a complete set again with box [or find a box later] and sell this MISB to a collector who would love to have a MISB of something they probably thought they couldn't get (if this is really as rare as I think).
In the end it's just plastic in a cardboard box, but still, I'm a collector so I know how it is.
I'm still going to put it in a protective plastic casing for a while [airtight or not, not sure if it's worth it]... unless I open it...


[http://www.seibertron.com/energonpub/viewtopic.php?f=4&t=55995]