Great idea
My suggestion for this town, is maybe have a quest or job offer an example for a quest would be like collect 50 fish of any kind and they would pay you more gralats than it would normally sold like 50 crystal logs is sold for 1800g in the woodshop, but in the town when the daily quest or job offer it would cost about 200g more.
Another job offer is have an NPC be like godzilla/jeffzilla roam around causing havoc and players have to work together defeat this NPC to save the town.