I have some coupon codes I'd like to sell on Ebay. Usually when people are buying coupon codes they are looking to get them right away, and so I'd like to be able to accommodate that, but of course I don't want to just hang around my computer all day waiting for sales. So I'd like to set up an automated system wherein there' s a database full of the codes, and upon receiving payment the next unused coupon in the database is sent to that customer. Does any one know how to set up something like this?