This just popped into my fron.
Tie in the sale of metal bars into the daily spot price of that metal. Sometimes it's a little more, sometimes less.
By the way, (sorry to admit), I've only recently began playing WZI, and I like it. My mind is flooded with ideas everytime I cycle through, so please forgive my noobness.
I'm only up to Zinc, what other metals can I expect to see in WZI?
In case your are interested in this idea, go to this website. https://www.dailymetalprice.com
Select your metal, ounce, pound, or ton and see results.