Leather arrives by skinning, so its supply tracks how many players are leveling through skinnable zones at any moment.
Leather (Tradeskill)
Auction-house prices and price history for Leather in MoP Classic.
71 items in Trade Goods › Leather are currently auctionable in Mists of Pandaria Classic.
Prices refresh daily from TradeSkillMaster (TSM), so day-to-day gaps in lower-volume listings are expected rather than a collection problem.
Leather listings link to price-history pages with per-realm buyout, average, and median data for Mists of Pandaria Classic.