One interesting item is the Legend Quest Omnibus, which is apparently a compilation of all the books for a 1980s RPG that got decent reviews in Dragon (I think). However, at $30, I'm not that curious.
I3-5 Desert of Desolation - Compilation of the I3-5 modules from the Hickmans, not set in the Forgotten Realms. I love Ancient Egypt, but these didn't do much for me. $9.99 and 128 pages
PC3 Creature Crucible: The Sea People - Racial classes for basic D&D for all sorts of underwater races. $4.99 and 96 pages.
REF3: The Book of Lairs - Basically a bunch of short encounters. $4.99 and 96 pages.
REF4: The Book of Lairs II: Electric Bugbear - More of the above. $4.99 and 96 pages.
AdventuresDark Colony - Big sci-fi horror adventure from Eldritch Enterprises - aka Jim Ward and Timothy Kask. Uses their generic (and really crappy) stat system, but it's not too hard to convert to D&D/Gamma World/MA/OSR. 123 pages and only $6.
Sexbots - For one of the more overlooked OSR Sci-Fi games, Machinations of the Space Princess (which is close to being Lamentations of the Flame Princess in space, but actually good). Seemed to be completely forgotten until this popped up, though it hardly qualifies as a major product. 18 pages, .89 cents
Friday Freebie Enhanced Map 10-21-16 This is a very interesting map that features cros-over tunnels. $1 for the enhanced version