How to view a game's sale history on SteamGameSales when it's not on sale?

http://steamsales.rhekua.com/

steamgamesales.com/app/appID
(If you need a reminder later on about this, visit the History of any game, and scroll down to the "Tip" near the bottom. (Although the example given is apparently no longer a valid Steam store URL...))

Thanks guys.