Indexes into failureStrings for the Vendor, indicating the reasons why it failed if any.
I may regret naming it this way - but this represents when an item has an objective that doesn't serve a beneficial purpose, but rather is used for " flavor" or additional information. For instance, when Emblems track specific stats, those stats are represented as Objectives on the item.
The index of the item in the related DestinyVendorDefintion's itemList property, representing the sale.
If true, the user can not only see the item, but they can acquire it. It is possible that a user can see a kiosk item and not be able to acquire it.