OpenCart 1.5.6 and posible all pervious versions have "zero checkout" bug, for example: if user use Gift Voucher with value 25€ and user's order total less (21€ for example), OpenCart forward user to the checkout page with zero in order's total and it cause critical error for payment gateway's APIs,...
It will be nice to have build in to the core solution to sell digital products (serial numbers).
For example to sell serial numbers for games, xbox live, wow, etc. or serial numbers for programs.
For sale list & sold list for each product.
Delivery option: email