Bundle of Holding is doing two bundles that cover Hero System 6E and Champions 6E. I think it covers all the 6E books Hero Games published. I'll probably buy these.

Hero System 6E ($25 / $44)

HERO System Basic Rulebook
HERO System 6E v1: Character Creation
HERO System 6E v2: Combat and Adventuring
HERO System Advanced Player's Guide
HERO System Advanced Player's Guide II
HERO System Equipment Guide
HERO System Skills (née The Ultimate Skill)

Star Hero
Fantasy Hero
HERO System Grimoire
HERO System Martial Arts
HERO System Bestiary
The Ultimate Base

Champions 6E ($25 / $42)

Champions Complete
Champions: The Super Roleplaying Game
Champions Powers
Champions Universe
Champions Beyond
HERO System Book of Templates

Champions Villains v1: Master Villains
Champions Villains v2: Team Villains
Champions Villains v3: Solo Villains
The Book of the Empress
The Booklet of the Empress