Manual: Strong Anti-Venom

About 7s 0c on Beta · Alliance (2 hours ago), 8s 0c on Beta · Horde (8 hours ago), and 9s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 2s 25c, so the auction house pays 3× 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 6s 65c there, against 2s 25c at a vendor.