Wise Man's Belt

About 40s 0c on Beta · Horde (3 hours ago), 99s 0c on Beta · Alliance (6 hours ago), and 1g 5s on Beta · Alliance (24 hours ago), from player scans. A vendor pays 2s 78c, so the auction house pays 13.7× 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 38s 0c there, against 2s 78c at a vendor.