Plans: Hardened Iron Shortsword

About 12s 0c on Beta · Horde (15 hours ago) and 77s 0c on Beta · Alliance (16 hours ago), from player scans. A vendor pays 7s 50c, so the auction house pays 1.5× 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 7s 50c at a vendor.