Great...just need to put some gas in my machine
You can buy it by itself.
But for some reason some publishers have told Valve to boost the prices so when the discount comes off it is the same price.
EDIT: Forgot to say prices have changed, or things have been added to hide that fact.
GTA V for instance now has the shark codes, when before it didn't have them.
[Edited by DABhand, 6/11/2015 7:01:36 PM]