Actually, I forage on average 160pp worth of granite in a dungeon and we rarely, if ever, stay the full time. I have never left a BB adventure with fewer than two, and once left with 9. Sold a set of 72 the other day for 3 grand. On the other hand, I have also given stacks to friends for free. It's no different than Morning Dew. I forage usually 2 every time I do a BB LDoN (one on the way, one on the way back). They go for around 25pp per on my server. If you see them drop, offer to forego your split for them.