W'rkncacnter
Hero
you might be thinking of pf2e's inventory systemI'm not sure where I had stumbled across, and it's possible I dreamed it up accidentally, but it seems to me that the question of weight of gear/money wasn't just weight but an abstraction of the BULK of the item in question. So, scale may not actually weigh what it's listed as, but the bulkiness is represented as the coin-weight. YMMV