Hard to find much of anything anymore for just a buck but you can still wash your car for just four quarters (SLOWLY!) in one Yakima Valley town.

TSM/Todd E. Lyons

Hint #1: This town (pop. 3,300) doesn't have a stop light in it.
Hint #2: The town had been known previously as "Artesian".
Hint #3: It's annual hop fest is one of the bigger events in the valley annually.

TSM/Todd Lyons

If you guessed Moxee, you are correct!

Sharp's Automotive Service, where they still have attendants that will pump your gas for you, has an adjacent car wash where you can clean your rig for only a dollar.