Haunch of Meat

About 6c on Beta · Horde (4 hours ago), 7c on Beta · Horde (21 hours ago), and 8c on Beta · Alliance (23 hours ago), from player scans. A vendor pays 6c, so the auction house pays 0.9× 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 20 brings 1s 20c there — more than the auction house nets after its 5% cut.