Myth Drannor came with several (typically 8, I think) pages of monsters punched for a binder. The earliest 2e Monstrous Compendiums were also loose-leaf & punched for a binder, and there were possibly a few DM's helper sort of accessories that might have been punched for a binder.The Ravenloft and Myth Drannor boxsets may be mixed together a bit. I'll be taking pictures of the various pieces to try identify what goes where.
I have something else I can't identify that is a bunch of individual pages. Looks fairly recent print wise (90s?), and is 3-hole punched. I'll be taking pictures of that too to figure out what it is.
Also, we should ping [MENTION=1613]grodog[/MENTION] and see what he has to say. If nothing else, he'll like hearing about someone getting a bargain.
It looks like you got AD&D 1E mostly, and a few 2E items, which are very close/compatible ruleswise.
Are you familiar with either of the AD&D rulesets? AD&D 1E has a good retro-clone/pdf-reference in OSRIC. But you could probably get the 1E DMG/PHB/UA/MM/MM2 from ebay for very cheap. They're worth a read. Personally i like to blend 1E and 2E AD&D.
I would recommend assembling this into a generic/Greyhawk old school campaign, using either 1E or 2E AD&D (or a blend of both). If you have Greyhawk specific questions check out Canonfire! World of Greyhawk on the Web.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.