You can get Crusader Kings 2 as well as Victoria 2, Sword of the Stars Complete(one of my favorite 4x space games), Sword of the Stars II, and all of Magicka and its DLC(also a fun game) for just $2.50 more ($12.49), also off Amazon.
Amazon - 2 days time:
Also during 11/23-11/26 the Paradox War Chest moved from $9.99 to $7.49 and contains:
They also have then this for $5.99
http://www.amazon.com/Pint-Sized-Paradox-Package-Download/dp/B008G0ZXSK
and this for $9.99
http://www.amazon.com/Paradox-Interactive-41089dox-Package1-Plentiful/dp/B008G0ZDZI
Don't buy it alone:
CK2, Some CK2 DLC, & 5 other games - $19.99
Some CK2 DLC (no full game) & 3 other games - $5.99
I'm pretty sure the $10 and $6 copy contain everything in the $20 bundle too. Included DLC is just shields, songs & units.
No man, hold up. Buy it off of Amazon. Right now Pardox has several bundles with CK2 and all the expansion plus tons of other games in the bundle for 90% off. I bought over $200 worth of paradox games two nights ago for about $14 off of Amazon.
Its also in these packs:
There is also the Plentiful Paradox Package ($12.49)