This doesnt make sense. You want someone to make an account, use their money to pay for a camera, and hand the info over to you (excluding cc on account)? You know you can easily track orders without an account (eg tracking number or link in email can be used without being login to the account for tracking purposes only). Next, final payment shouldnt be in paypal because you could simply reverse it easily. Why not pay in bitcoin instead or use btc to pay for the purchase? There are services that allow you to go to flat easily (eg coinbase + shift payment, bitpay debit card, etc)
I will say this: Your whole request is very fishy as it seem like youre wanting to commit some form of fraud. Even if one deletes a credit card from the account, it is still tied to the account (from the order) which means the person who initially signed up and enter the info could be in trouble if something does happen. On top of that, if someone wants to be paid in bitcoin, it is NOT collateral. It is payment. You cannot give someone a choice of what to be paid in and then state one of them is collateral. Escrow can be used, but there is still a risk to the whole thing.
