...which is basically D&D gold value. AD&D changed the gp/gp/cp size from 50/lb to 10/lb. So plate mail (50 lb of steel) cost 400 gp (40 lb of gold). Henry VIII equipped a group of soldiers with the equivalent of plate mail for 2.35 lb of silver each. That puts AD&D gold at about 3x the value of copper in 16th cen England. In 3.5e plate mail sells for 600 gp (12 lb), which is still only 1/5 the value of silver in the Tudor England.