Schematic: Portable Bronze Mortar

About 1g 30s on Beta · Alliance (28 minutes ago), 25s 0c on Beta · Horde (6 hours ago), and 50s 0c on Beta · Horde (24 hours ago), from player scans. A vendor pays 4s 62c, so the auction house pays 26.7× 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 23s there, against 4s 62c at a vendor.