MC1 - This is the monster book for 2e. Or one of them. $4.99, 144 pages. I ran 2e some, but I used 1e monsters, which was probably a mistake since 2e ones are often much tougher.
MC2 - The second volume. Also 144 pages and $4.99
The Invasive Invertebrates - Something from the Frugal GM. PWYW
The OSR Summoner - Essentially a combination of the Pathfinder class and the 2e's Sha'ir . PWYW or get it here free
The Price of Rebirth - Rules for returning from the dead for White Box, because I guess going to the Temple of Law isn't old school enough. $2.99, 15 pages.
25 Knight Illustrations - Public Domain art by N.C. Wyeth. PWYW
Monolith Tower - Neat 7 maps tower by Paratime Design. $5.50
Mountains - A generic guide to mountains. Free.
The Crystal Cave - Neat map of a cave. 99 cents
The Forbidden Sanctuary - Not sure what this is a map of, looks more like a truck stop or something. 99 cents.