[H] Holiday Sale 2011 Gift: Mafia [W] Keys

And how much?

Hello,

Anything from
http://www.steamtrades.com/trade/E1WPq/halien-ragepapoyyosiralimwoolfeeidolonsyberia12-w-viktor-metal-slug-3x-faerytf2gems
http://www.steamtrades.com/trade/KwggC/hgrimrockeadornovelistbl3dlcparanauticalfear2psychonautscostumequestw-steamgogtf2-keys
http://www.steamtrades.com/trade/LBDhT/h-gog-xenonautsstalker-clear-skysim-city-2000-seundyingewj-w-gogsteam-games-tf2-keys

for Mafia or Bulletstorm?

Thanks

what is OBO ?