Buying Civ V from GMG worth or not?

lets start with basics, in which currency...

You could buy this from dispenser.tf for 2 tf2 keys (3 euro or 4$). GMG is too expensive.

or for 1,5 key on steamtrades ;)

http://www.gamersgate.com/campaign/22/2k-week-civilization Complete edition 8.50$

I can sell for TF2/CS:GO or DOTA2 keys more cheaper. :D

if you want to buy just base game, its cheaper from traders, if you want complete edition propably buy during a sale (complete is much cheaper than buying dlc separate)