Hello @RM9 !
Here is the link to buy RHCSA exam ( EX200 ) :
Select your location and click on get started :
On the next page - you have an option to login ( if not registered , you can register with it ) and then you should select the "INDIVIDUAL EXAM" offering as shown below :
Add it to cart and then checkout for payment - done !
For scheduling the exam - use the scheduler app post your exam purchase : https://rhtapps.redhat.com/individualexamscheduler/#/AuthenticateUser
Should you need any help in purchase or if you are facing any issues - please feel free to reach out to our support team here : email@example.com .