Thank you for the comments, everyone.

Yes, I am rather strapped for money as of now, I might wait until it drops to around 20 dollars. If BI was a standalone game, then it might have warranted a 30 dollar price, but for an expansion pack, it's a tad too much.

Yes, from the looks of it, BI is the sort of game that RTW Vanilla should have been. I liked RTW Vanilla, but the AI... dried the experience a bit too much.