If you are capable of convincing people with security of your generated vanity addresses, you may start selling it.
The project has already been announced, you can go and see:
https://addrstore.comCreated the topic:
https://bitcointalk.org/index.php?topic=1910615.0Are you sure your vanity address are still secured like you have not got access to its privatekey part ?
Of course, for pre-generated vanity addresses, the private key will already be known at least to the service that generated it, and to the user who wants to get a vanity address. But in order to safely use the pre-generated vanity address, you can use transactions with a multi-signature.
I do see people are following some well-prescribed/foolproof method for preserving the secret of privatekeys, but you are claiming your address were per-generated.
Such pre-generated vanity addresses can cost significantly less than those obtained using a partial private key. By the way, generation with the use of a partial private key is also available for us. This section is called "Personal addresses":
https://addrstore.com/?category=Personal_addresses, when placing an order, the user must specify his private key.
You can post in service section with few example vanity addresses and price levels and with some discounts for bulk purchases but I am afraid you may face hard time for proving the security of per-generated address.
Nothing to prove is not necessary. The private key of the pre-generated vanity address is known to us and it's a fact, there's nothing to hide and no one wants to cheat. But the user can safely use this address only using some of the capabilities of the bitcoin network (multi-transactions, P2SH addresses), or another way of using it - the user trusts our project and uses a vanity address as usual. But in any case, we delete the private key of the sold vanity address in a semi-automatic mode without the possibility of recovery.