expired [PC] Civilization V: Gods and Kings $5.41 with Coupon - Green Man Gaming
This was posted 4 months 25 days ago, and might be an out-dated deal
This is the cheapest price for CiV V: Gods and Kings that I have seen so far. Its $24.99 at Steam atm.
Note that this is only the expansion, not the full game.
If you don't have account yet, feel free to use my referral link to get extra $2 for both of us: