Explosive Sheep

About 15s 97c on Beta · Alliance (1 hour ago), 11s 0c on Beta · Horde (7 hours ago), and 21s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 10s 0c, so the auction house pays 1.5× 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 75s 86c there, against 50s 0c at a vendor.