Dreamer's Belt

About 25s 0c on Beta · Alliance (3 hours ago), 60s 0c on Beta · Horde (9 hours ago), and 90s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 8s 30c, so the auction house pays 2.9× 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 23s 75c there, against 8s 30c at a vendor.