Small Blue Pouch

About 5s 0c on Beta · Horde (5 hours ago), 4s 0c on Beta · Alliance (23 hours ago), and 4s 0c on Beta · Horde (24 hours ago), from player scans. A vendor pays 2s 50c, so the auction house pays 1.9× 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 4s 75c there, against 2s 50c at a vendor.