They gathered information on Test Server and also has a lot of players contributing with item names and lists. So far all of these has already appeared to the players, there are some specific items which didn't appeared yet, that's why maybe it's not completed, but it's a good source of information regardless.. I'm buying a lot of items anticipated to not have the risk to fail a single delivery task week, as I'm currently on Top 1 with many others :D But I can say there are some really hard to get items for the tasks like Night Harpy Feathers and from new creatures that players are still not hunting too much yet