Deviate Fish

About 99c on Beta · Horde (6 hours ago), 3s 84c on Beta · Alliance (1 day ago), and 84c on Beta · Horde (1 day ago), from player scans. A vendor pays 4c, so the auction house pays 23.5× more.

2 recipes: Elixir of Giant Growth and Savory Deviate Delight.

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 20 brings about 18s 81c there, against 80c at a vendor.