In order for an item to be added to the system, someone currently owning said item has to log onto the site and have their inventory scanned. If there is nothing searchable under the name, then nobody owning the title as a tradable copy has logged into the site with it in their inventory, which isn't surprising for newer games that aren't high profile titles.

I see. That's weird, my friends have been saying it looks great. I was hoping that by now there would be people selling it. Thanks for the reply, though.