It's not a bug, but with new stacks sizes the prices for common materials (copper, pine, etc.) got wrong in Tarsos. It should be 0,75G/each, not 1G/each. So stack of 1500 pieces should be 1125G, now it is 1500G.
The other prices are correct. 2G/each for uncommon and 3G/each for rare materials.
The other prices are correct. 2G/each for uncommon and 3G/each for rare materials.