On Russian Uplay Store, Tropico 5 Pre-order plus 2 free games (Anno 1404 Gold and Port Royale 3) are 6,29 руб which is around $0.18 (yes, 18 cents!)
It has been like this for a few hours now but they will fix it soon I guess.
Uplay is out of keys for Anno Gold and Port Royale 3 but they should soon fulfill the orders.
Now, nobody knows whether Tropico 5 will have any language restrictions or not but for 18 cents it is well worth it.
Of course you need to use VPN or proxy to do it and DO IT AT YOUR OWN RISK.
Edit: You can also use coupon code: "10thanks" for an additional whopping 10% off! (this is cheap ASS gamer after all)