These mirrors by Hafny bounce between $22.99-23.99 on Amazon, and have proven easy to install, and highly adjustable so I can see everything I want to see. They’ve also endured a couple smacks from the door.
They make a left and right side. I just buy the left. You’ll make your decision based on what side of the road you ride on.
The Amazon link above works in the United States, Canada, and United Kingdom.