From June 7th, 2017 to March 4th, 2023, 100% user give 5-star rating. for Price History for Steam™ chrome extension.
Perfect extension. I'd like support for other regions/currencies, but if you just want to see if it's the lowest price, USD works for that pretty well. (If you want other currencies you can use SteamDB website but that's not an extension.)
Nice, quick way to view previous sales for a game - don't overpay!