Can you sell to existing members without them having to put their credit card number in again

Can you sell to existing members without them having to put their credit card number in again?

I want members to only have to enter in their card 1 time, then have the ability to buy more courses (ccaps) in the future with 1-click.

Is that possible or is there any ideas others have that could accomplish this?

Yes, if they save their cards with the payment gateway, like Stripe or Paypal. S2M itself have no such ability.