Seeping Gizzard

About 5s 0c on Beta · Horde (9 hours ago) and 5s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 3s 0c, so the auction house pays 1.6× 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 5 brings about 23s 75c there, against 15s 0c at a vendor.