Have been having some luck at buying the "extras" in the bundle cheap when the bundle itself is on sale. If it is one of those developers who will discount further if you already own some of the bundle. Needed 1 game from a bundle of 4 (owned the other 3). That game would have cost $1.50 on special but picking up the bundle, the game I needed was just $1. Not sure if the S.T.A.L.K.E.R bundle operates that way as I don't own any of the games. Been thinking I could do some giveaways for dlcs or follow up games..lot of users like yourself that want to complete their collection