Posted March 05, 2015
To be honest, I don't think this will work, as every single instance of the game offered should have a link to the post in which it is offered. So this would only be useful if one user offers, in the same post, multiple copies of the same game... which, as far as I can tell, hasn't happened yet. Other than that, I think this will only cause confusion.
montcer9012: I added a line to specify how many keys exist, called it QUANTITY. Hopes it help to have some order.
I believe Phoenix19's solution, to keep the list sorted alphabetically, is a better one.