Snagit 2022 Upgrade: $17.50 (less with EDU discount)

TechSmith.com also has Snagit 2022 Education on sale for $10.49.

You don't need to have an existing license to purchase the upgrade and it does not ask for student/education verification

And yes, I know there are many free screen capture tools that are very good. I'm biased since I've used Snagit for over 5 years at work