#1 - June 4, 2013, 10:08 p.m.
The Flag values do not seem right as I would have expected Masterwork and above weapons and armor to have the SoulBindOnUse flag set, but this is not the case. There are some items with SoulBindOnUse set, however, most of the other Masterwork+ items do not have that flag set.
For example:
https://api.guildwars2.com/v1/item_details.json?item_id=15305
