Bundles are cheaper when there is a sale going on, but the amount is negligible. When all of the packs were 50% off this summer, the bundle price was $33.98. At that time, if you bought an EX GP & SP separately, they would have cost $34.97 (0.99 more than the bundle price). Under the current sale, since GPs are only 25% off, a bundle will only save 0.50 over buying each type of pack separately ($39.47 vs. $39.97). So, I would only bundle during a sale if there is one pack of each type that you are interested in.