I have noticed a lot of threads and complaints against those who are spamming listings (multiple listings for same product). Why not add a quantity system to listings, similar to eBay? I realized this could pose an issue with Instant Delivery, however maybe a queue system would fix that? For example if you have five codes, the first sale sends first code in line, that code is now removed from the queue. Next sale, second code is sent and is removed from the queue, and so on. I am not naive in the fact that this would take a lot of time to implement, but it may beneficial for Gameflip to look into something similar to reduce the amount of spam listings.