Yeah dry spells could be a possibility, but at some point when there are 300+ on the auction house on a regular basis anyhow there will be a dry spell eventually no matter how you cut it.

I do like the fact that I could go and campaign battle for a weekend and have enough dusts to last for at least a week if not more. This means that people could supply their own in situations where there was a lack of supply. The problem is that unless we are doing any of the monsters in the past it is extremely time consuming to need to run and get new dusts in the middle of a run because of inventory concerns.

I'm mostly requesting this as a way so that people that are getting dusts from the NPC can store more when they go and get dusts.

I think that after the first couple weeks people hoarding voidstones that the market would sift back because I doubt most people are going to spend 1mil+ on dusts if they are not sure when they would using them. Even static have weeks where they use more stones than other especially seeing how the final fights don't use stones.