Wizard's Belt

About 1g 35s on Beta · Horde (5 hours ago), 1g 50s on Beta · Horde (23 hours ago), and 40s 0c on Beta · Alliance (1 day ago), from player scans. A vendor pays 7s 49c, so the auction house pays 17.1× 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 1g 28s there, against 7s 49c at a vendor.