Summary: As I write this update, Payday 2 is available on steam for $29.99 and the Armored Transport DLC is $6.99 which means what you get from this pack is worth $36.98. The description of this item explains it comes with 6-7 dlc/updates, however the only item it comes with that isn't free is the Armored transport DLC. Payday 2 has 7 DLC available, but it appears only 2 of those DLC are added gameplay/missions. The other 5 are simply weapon/mod packs.
Summary: Payday 2 costs $30 on steam. Armored transport costs $7. And you get both of those items for $20! It may be a little misleading saying it's a DLC "bundle" when it's really one DLC. The rest of the items listed are just free updates that everyone gets. But it's a great price and the game is great.