Dreamer's Belt

About 60s 0c on Beta · Horde (4 hours ago), 90s 0c on Beta · Horde (22 hours ago), and 40s 0c on Beta · Alliance (23 hours ago), from player scans. A vendor pays 8s 30c, so the auction house pays 6.9× 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 57s 0c there, against 8s 30c at a vendor.