Wizard's Belt

About 33s 0c on Beta · Alliance (3 hours ago), 1g 35s on Beta · Horde (9 hours ago), and 1g 50s on Beta · Horde (1 day ago), from player scans. A vendor pays 7s 49c, so the auction house pays 4.2× more.

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

Sell it on the auction house. After the 5% cut a stack of 1 brings about 31s 35c there, against 7s 49c at a vendor.