Heavy Spiked Mace

About 1g 43s on Beta · Horde (6 hours ago) and 1g 30s on Beta · Alliance (7 hours ago), from player scans. A vendor pays 14s 70c, so the auction house pays 9.2× 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 1g 35s there, against 14s 70c at a vendor.