Copper Mace

About 2s 0c on Beta · Alliance (34 minutes ago), 5s 0c on Beta · Horde (4 hours ago), and 6s 0c on Beta · Alliance (15 hours ago), from player scans. A vendor pays 1s 6c, so the auction house pays 1.8× 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 1s 90c there, against 1s 6c at a vendor.