This WA shows the quantity and currency value estimation of each herb and ore in your bag and bank, rank by rank, and you need TSM to see your gold estimation.
It might show nothing, but the moment you start farming your first node, or change an item's place in your bag, you'll see your item quantity and gold value updated.
It'll auto-disable itself when you're in an instance. You can add/suggest more conditions as you see fit.