Cat Carrier (Siamese)

About 15s 0c on Beta · Alliance (3 hours ago), 55s 0c on Beta · Horde (7 hours ago), and 15s 0c on Beta · Alliance (18 hours ago), from player scans. A vendor pays 15s 0c, so the auction house pays 1× more.

No. It is in Classic Era too, with the same item level, vendor price and stack size.

Sell it to a vendor. A stack of 1 brings 15s 0c there — more than the auction house nets after its 5% cut.