Companion pets feed the accountwide collection systems, which flattens their price differences between realms more than any gear market. The catalog taxonomy files Companion Pets under Miscellaneous. Everything listed below shares that subclass, which makes this a focused market view rather than the whole Miscellaneous shelf.
Pricing here moves the same way the rest of the catalog does — Retail pulls hourly from the Blizzard Auction House API, while the classic editions pull from TradeSkillMaster on their own cadences. Each snapshot is timestamped, so the detail page for any row below plots real movement over time.
Sort the table by item level or required level to find what matters for your character, or click through to any row for its full price-history chart across realms and game versions.