User blog comment:ThunderJimmy/The Wiki’s First Official Question and Answer (Q&A) Blog post/@comment-34891832-20180304084356/@comment-34081859-20180304133010

The more ore you mine, the lower the costs of ore will be, and in turn, increase the demand for the ore you mine up for trade. Eventually, the ore prices will neither increase, or decrease, and this is what those who understand economicas know as EQUILIBRIUM! [perfect price for quickly buying up ore to trade at the mega base for MONEY, MONEY, MONEY, MONEY, MONEY, MONEY!] The more ore you mine, the lower the prices become (except for uranium, for unknown reasons), so mine large quantities of different types of ore and the price is guaranteed to drop.