Dreamer's Belt

About 90s 0c on Beta · Horde (9 hours ago) and 40s 0c on Beta · Alliance (11 hours ago), from player scans. A vendor pays 8s 30c, so the auction house pays 10.3× 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 85s 50c there, against 8s 30c at a vendor.