The listing, Vessel, Torchlight, Rochard, S.P.A.Z., and Shatter (Steam Key) has ended.
Auction for these games from Humble Indie Bundle 6:
Rochard
http://store.steampowered.com/app/107800/
Shatter
http://store.steampowered.com/app/20820/
Space Pirates and Zombies
http://store.steampowered.com/app/107200
Torchlight
http://store.steampowered.com/app/41500/
Vessel
http://store.steampowered.com/app/108500/