Huge Venom Sac

About 24s 0c on Beta · Horde (9 hours ago) and 1g 0s on Beta · Alliance (10 hours ago), from player scans. A vendor pays 15s 0c, so the auction house pays 1.5× more.

1 recipe: Powerful Anti-Venom.

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 1g 14s there, against 75s 0c at a vendor.