What’s the deal about buying codes in large quantities? You end up paying a cheaper price per code. This is most useful for anyone willing to start retailing or for those who already have a site or online shop and want to increase their productivity and revenues.
My solution for you would provide codes for down to 3$, fast delivery, an API for automatic request and delivery, or an app to use in your shop to query in real time the status of codes requests.
The brands supported are the same ones from my remote unlock page, as well as the supported and unsupported networks.