Copper Chain Vest

About 12s 0c on Beta · Horde (5 hours ago), 10s 0c on Beta · Alliance (24 hours ago), and 10s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 1s 42c, so the auction house pays 8× 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 11s 40c there, against 1s 42c at a vendor.