Raw Mithril Head Trout

About 3s 0c on Beta · Alliance (1 hour ago), 17c on Beta · Horde (7 hours ago), and 22c on Beta · Horde (1 day ago), from player scans. A vendor pays 4c, so the auction house pays 71.3× more.

2 recipes: Fishing Rack and Mithril Head Trout.

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 57s 0c there, against 80c at a vendor.