Second floor of the Outsiders' Landing Inn ( -96, 4, 104 ) /waypoint -95.67, 4.43, 104.05
This NPC is actually an interactive (clickable) desk, located on the upper level of Far Seas Supply Division building ( -96, 4, 104 ) /waypoint -95.67, 4.43, 104.05 in the Village of Shin (Isle of Mara). When you reach level 50 in your tradeskill, you can click the desk to get the weekly tradeskill quest it offers. If the quest requires crafted items, the recipe book used for the quest is located on the desk itself. When any of the weekly quests is complete, click on the Supply Cupboard to the right of it to complete the quest.
Possible Weekly Quests from the Priority Orders Desk: