>>43350826First, buy product from your LGS. Support where you play.
Then the next option is to buy all that shit from Ebay. Many times people are reselling unopened boxes discounted with free shipping even.
Then and only then you buy directly from GW. Bundles are just one-click bundles. They are not discounted at all. GW just added all the kits contained together and added up the prices and are selling it at full retail. In fact, when you get it in the mail, it will just be all the boxes contained in that picture.
So in short:
LGS > Ebay > GW