THQ collection for trade

Im looking to trade my THQ collection via Steam.

This collection includes:
Company of Heroes,
Company of Heroes: Opposing Fronts,
Darksiders II,
Darksiders™,
Dawn of War II: Retribution – The Last Standalone,
Homefront,
Metro 2033,
MX vs ATV Reflex,
Nexuiz,
Red Faction,
Red Faction II,
Red Faction®: Armageddon™,
Saints Row 2,
Saints Row: The Third,
Supreme Commander,
Supreme Commander: Forged Alliance,
Titan Quest, Titan Quest - Immortal Throne,
Warhammer 40,000: Dawn of War II: Retribution,
Warhammer 40,000: Space Marine,
Warhammer® 40,000™: Dawn of War® II,
Warhammer® 40,000: Dawn of War® II Chaos Rising

I would like to trade for:
AC3
Far Cry 3
or Steam Wallet cash/credit/whatever they call it.

do Titan Quest & Titan Quest - Immortal Throne come as separate keys or single key as in TQ Gold?