Build your own SEGA bundles on Gamefly.

Apologies if these were posted, but I didn't see them on a quick search. They're not amazing deals, but they're decent:

Here.

The first bundle offers 3 games for $8 (or 4 for $10, or 5 for $12.) NiGHTS into Dreams, Sonic Adventure 2, and Jet Grind Radio are available for Steam, and all three are excellent and well worth $8 if you like that sort of thing.

The second bundle offers 3 games for $10 (or 4 for $13, or 5 for $15.) AvP, Binary Domain, Company of Heroes, Wrath of the Dead Rabbit, Renegade Ops, Sonic the Hedgehog 4 Episode 2, The Cave, Viking, and Dawn of War II are all on Steam.

A bit pricy, and several of these are on sale a lot, but good games in all.