> If there is no human input or labour involved in mining, manufacturing and distribution of a product, especially if that product is only used by other autonom

> If there is no human input or labour involved in mining, manufacturing and distribution of a product, especially if that product is only used by other autonomous system Creation, energy and maintenance of machines are not free. People who provide this things to site need money too, so it adds to price of mined items. Then moving and transforming/smelting those things costs too. Watch springs are several orders of magnitude more valuable per kg than raw mined iron.