Cheapest way to upgrade

I went directly from vanilla to BNW so I don't have any of the other DLC (Korea, Denmark, Babylon, etc) or additional wonders. I guess I stupidly assumed that stuff would be included in the BNW download. What would be the cheapest (legal) way to aquire the missing content?

http://store.steampowered.com/app/8930/
Buy the Gold Edition Upgrade from there for 10€.
It includes all DLCs and G&Ks.

I don't have Wonders of the Ancient World, but BNW gives you Temple of Zeus (since it's the Honor-specific wonder). Still no ToA or Mausoleum though.