What's the longest you've spent camping an item only to leave empty handed?

[azeth]

On Live, during a transition between between a guild I was in before I joined what would end up being my permanent/raiding guild, I didn't have much help to do the Ragebringer.

Equipped a fishbone earring and hung around phinigel for probably 100-200 hours before I had an opportunity to pay a group for their Kedge robe loot.