You are welcome.
I have noticed that CK2 is not currently on sale. CK2 is $40, and CK2 Collection is $80 now.
The game most likely will go on sale for 50% off.
If you have other games to keep you busy, wait until summer sale, so then it'd be a lot cheaper.
As a result, you might get CK2, and most of the DLCs for $40.