Our trade-goods catalog covers cloth, leather, hides, metal and stone, herbs, elemental motes and shards, enchanting reagents, jewelcrafting gems, parts, devices, and the various class-restricted reagents Blizzard ships per expansion. Each subclass corresponds to a profession's primary input pipeline, so a quick glance at the subclass column tells you which tradeskill the item feeds.
Click any trade-good entry to open the price-history page for that material. That page shows current minimum buyout, average and median sale price, and total quantity listed across the auction house. The history chart is invaluable for crafting professions because materials follow patch cycles: a new expansion patch sends old-content materials cheap and new-content materials expensive, and the chart surfaces those transitions weeks before they're obvious in the in-game UI.
Toggle between Retail, MoP Classic, and TBC Classic at the top of the page to compare the same material across game versions when applicable. Switch the realm dropdown to see how the same material prices on a different server — useful for planning cross-realm purchases or for understanding the relative health of one realm's economy versus another's. Pricing for Retail refreshes hourly via the Blizzard auction-house API; pricing for MoP and TBC Classic comes from TradeSkillMaster (weekly for MoP, hourly for TBC).
If you're sourcing a specific material by name, the search box on the main item-database page narrows fast. If you're scanning a profession's inputs, the subcategory sidebar drills from Trade Goods into Cloth, Leather, Metal & Stone, Herb, Elemental, Jewelcrafting, Enchanting, or Parts. Every catalog row links to its corresponding in-game listing, so you can move between research and purchase without losing your place.