Valve is implementing a number of new changes to its Steam platform, all aimed at enhancing the quality of the user experience for gamers. One of the latest updates involves adding a 30-day price history to all listed games. This feature will allow buyers to see if a game's price has changed recentl...
Up to two years of price history here:
https://steamdb.info/
https://isthereanydeal.com/ has 3 years of price history and tracks valid 3rd party stores too (not greymarket sites like G2A).
Price histories for games on both ITAD and gg.deals seem to go back to 2014.
I forgot that since I usually just check 6 months/1y/3y but they do huh. Even better!
*while not signed in. Once you do, you’ll get access to the full historical data