This is a bundle of d20 products published by Alderac Entertainment for D&D 3E (2000) and 3.5E (2003). The main thing in this bundle is World's Largest Bundle (2006) which I've read mixed reviews. World's Largest City (2006) is kind of interesting as a big location with lots of things to do. Adventure I and II are a bunch of separately published adventures gathered together and tied together into grand campaigns. The other books are supplements, which I don't really care about.

Starter Collection ($13)

Ultimate Toolbox ($30)
Empire ($5)
War ($5)
Mercenaries ($10)
Gods ($4)
Magic ($5)
Relics ($5)
Adventure I ($4)
Adventure II ($4)

Bonus Collection ($15)

The World's Largest Dungeon ($40)
World's Largest City ($20)
Dungeons: A Guide to Survival in the Realms Below ($5)
Dragons ($10)

So for $13 there are $8 of stuff I want. For another $15 there is another $60 of stuff I want. $28 for $68 of stuff. From the DriveThruRPG reviews of World's Largest Dungeon/City these are OCR scans and not amazingly great especially regarding the huge maps.

All in all I think I'll skip this bundle.