Without seeing them, I'm pretty sure you're correct about the cinema promo bags.
You could start a "newbie learning about marble bags" thread which you bump as needed. [Edit: And you could keep adding to this thread.] Could be a sort of interesting way of tracking your journey. Could provide a nice perspective for other newbies.
Or you could start a new thread for each individual bag. Whatever your preference.
Some people don't like links to active auctions.
You can get around that by right-clicking on the image in the ebay listing to get the address and post that link directly. (The forum software should automatically turn the link into a viewable photo.) Then we just have the picture and we can chat about it.
(I doubt most mind a new collector's links to auctions for purposes of gaining vital information, but just posting the pic for a general discussion should cover the bases.)
Here's a polished one Mike posted which showed innards from a different perspective ...
http://marbleconnection.com/topic/7520-under-the-onions-skin/?do=findComment&comment=138785
Wow at that beauty!
I couldn't remember ever hearing of anyone seeing one over 3/4". And I should have known what size No. 4 was, but for some reason I wasn't letting myself realize it was over 3/4". I needed that fact poured into my head again.
Thanks Dan and Brian.
You do need to find someone who will love the set. I hope you find someone who will keep it together and appreciate it as a piece of history. A piece of the life of a serious marble player.
The second marble from the top might be a Moonie. Possibly an Akro Moonie.
That would be another of the collectible solid colored ones. If you hold it up to a light does it look orange when you look through it?