Civ 5 complete edition dropped 75% 2 weeks after launch in 2014.
Civilization V Complete drops 75% in price two weeks after initial release
Civ 5 Standard was $19.99 about year after launch in the fall sale of 2011.
Point is, these sales have had their prices hiked pure and simple and these are for the same legacy games which had better price discounts 3 years ago. How prices can go UP after 2 and a half years on games that are over 7 years old when 2 and a half years ago they were more than half the price of what they are listed for today in this "Sale", is ridiculous.
It isn't about a "sale" any longer. It's about conditioning and mind think to get people to think they are getting a great deal, in which some cases they are, and in others they would have had a great deal if they could time warp back to when Steam sales actually mattered in 2015. Digital sales (Depending on your region) are still awful for Sony/MS marketplaces in comparison when someone takes a look around at the marketplace.
Just be a smart consumer. Steam isn't what it used to be any longer - that is evident. It is a great platform to hold games and launch/friends/play, but their sales are now irrelevant compared to past history, and competition will easily be able to find you better deals in which you will probably register the code with Steam anyway.
Now, I am not saying that's Valve's fault. It's the publisher's fault. That's for certain. Valve has done a ton of great things including digital refunds of games and protecting gaming consumer rights. But these "sales" are less than what they were a couple years back, and that's across the board. And Steam is no longer the end all be all glory of sales during summer/fall/winter any longer, and you will probably find better deals elsewhere moving forward.