I will guarantee to buy leather from you.
I will guarantee to buy ingots from you.
What are fare market values?
This looks like a Job for.......SUPER TOV!!!
Anyway
Leather: High End - 30 gold/hide, Low End: 8 gold/hide, Average: 15 gold/hide
Spined Leather: High End - 60 gold/hide, Low End: 20 Gold/hide, Average: 35 gold/hide
Horned Leather: High End - 80 gold/hide, Low End: 40 Gold/Hide, Average: 55 gold/hide
Barbed Leather: High End - 150 gold/hide, Low End: 60 Gold/hide, Average: 60 Gold/hide
Iron: High End - 30 Gold/Ingot, Low End: 5 Gold/Ingot, Average: 10 Gold/Ingot
Dull Copper: High End - 35 gold/Ingot, Low End: 10 Gold/Ingot, Average: 15 Gold/Ingot
Shadow: High End - 50 Gold/Ingot, Low End: 20 Gold/Ingot, Average: 25 Gold/Ingot
Copper: High End - 40 Gold/Ingot, Low End: 15 Gold/Ingot, Average: 20 Gold/Ingot
Bronze: High End - 60 Gold/Ingot, Low End: 15 Gold/Ingot, Average: 25 Gold/Ingot
Gold: High End - 80 Gold/Ingot, Low End: 15 Gold/Ingot, Average: 30 Gold/Ingot
Agapite: High End - 100 Gold/Ingot, Low End: 20 Gold/Ingot, Average: 40 Gold/Ingot
Verite: High End - 150 Gold/Ingot, Low End: 50 Gold/Ingot, Average: 80 Gold/Ingot
Valorite: High End - 200 Gold/Ingot, Low End: 70 Gold/Ingot, Average: 100 Gold/Ingot
You can set whatever prices you like but this is a nice guideline
from the market flux I've seen in the past 3 years of playing. Tends to go up and down depending on the times.