HTM's store host Clips4sale has begun rolling out user accounts! 
Sign up here -
https://www.clips4sale.com/user/signup

This will allow you to see your order history, store payment info(the way Amazon does) for quick and easy checkout, and easy access to your wish list and favorite stores (like HTM!).

Early adopters have told me anything you've ordered in the past with the email you've signed up with should be in your order history already.  Try it out and see!  This should greatly improve everyone's experience on the C4S site.