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At $7.50 each, Binary Domain is the only one you'd save money on. The rest would reach that when they go 75% or lower if they receive a price drop.

The entire bundle for $30 isn't that bad if you don't have any of them.

Binary Domain - $10
Shogun: Total War 2 - $7.50
Sonic Generations - $7.50
Jet Set Radio - $2.50 (Don't think it's been that cheap quite yet, but soon enough)
Aliens vs Predator - $3.75 (Has been cheaper elsewhere)
Renegade Ops - $3.75 (Has been cheaper elsewhere)

So it'd be $35 if they were all 75% off.