Hey just thought I'd give you guys a heads up. GameFly has a sale going on (it ends on Friday) for a whole bunch of the Civ titles. Check it out:
http://digital.gamefly.com/#!/promotion/181?cid=civ5100714
You can have Civ V Complete Edition for $20.
P.S. Yes, the page has a glitch that makes it refresh all the time. Super annoying.