Stockers are collection games. There are 5 kind of stockers:
When you click on one of the above stockers, you will be brought to a new page.
Each page will have 3 links. Each of these links contain the same items that can be put into that stocker, only the sorting is different.
List 1: sorted by alphabet
List 2: sorted by rarity number
List 3: sorted by Buyable/Unbuyable (B/U)
Some of the buyables may turn into unbuyable, depending on the availability on the site and the other way around.
Sorry if some information regarding this is incorrect.