Steam releasing a "COMPLETE THE SET" pricing for bundles.
I LOVE THIS. Great on them for implementing it even though I own like 2 Steam games...hopefully this can roll out to other game Stores. I know I have not bought multiple bundles because I own part of it and don't feel like I would be getting "a deal". It is the SDer in me, what do I say.
Apparently it is already priced out on some bundles, mostly ones from Valve as it appears the Publisher/Dev has to go in and set the discounts.