Raw Sunscale Salmon

About 18c on Beta · Alliance (14 hours ago) and 1s 15c on Beta · Horde (14 hours ago), from player scans. A vendor pays 10c, so the auction house pays 1.7× more.

1 recipe: Poached Sunscale Salmon.

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 3s 42c there, against 2s 0c at a vendor.