Well, I would be interested in a more “historically accurate” coinage system. Not completely realistic, just one based in s.p, gold coins being rarer, etc. Of course, making an entire economic system for a game is a lot of work, and I don’t particularly hate the D&D standard prices, so I tend to use the last, anyway. Still, sometimes the numbers are so high that I ask if there is so much gold in the world that many people would carry or gather in treasure piles.