Each entry in our item database carries the same metadata Blizzard publishes through the official game-data API. That includes the item's display name, item level, required level, quality tier, primary inventory slot, and class + subclass taxonomy. We surface the metadata so you can scan a category at a glance, sort by what matters to you, and click through to a detailed price-history view.
Pricing is collected on a regular schedule. For Retail we pull a fresh snapshot from the Blizzard auction-house API every hour. For MoP Classic, TBC Classic, and Season of Discovery we pull from the TradeSkillMaster (TSM) data feed, which aggregates auction-house listings weekly for MoP Classic, hourly for TBC Classic, and about twice a day for Season of Discovery. Every snapshot is timestamped and retained, so the chart on each detail page shows real movement over weeks and months rather than a single instantaneous quote.
Category pages give you a stable link for a whole slice of the market. Bookmark one and it reopens the same view on any realm without rebuilding filters; share one and the reader lands on the live table with no account or saved state needed. Guild forums and spreadsheets can point at a category URL knowing it will still resolve next patch.
If a category contains too many items to display on one page, the table is paginated and the pagination controls appear below the list. Use the search box on the item database home page to narrow by item name, or pick a subcategory from the "Browse subcategories" links below the copy to drill into a specific subclass. Every item in the category links to its full price-history page, where you can see Retail, MoP Classic, TBC Classic, and Season of Discovery pricing side-by-side when applicable. Prices update as soon as a fresh snapshot lands.