Mount Equipment — one of the subtypes World of Warcraft files under Miscellaneous — gets this table as a focused view: the same drill-down the in-game Auction House browser applies when you filter by subcategory.
Each Mount Equipment row links to a detail page showing the current minimum buyout, the average and median sale price, and total quantity listed. The realm selector compares the same item across servers, and the edition selector appears wherever an item exists in more than one game version.
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.