Small Blue Pouch

About 4s 0c on Beta · Alliance (42 minutes ago), 5s 0c on Beta · Horde (7 hours ago), and 4s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 2s 50c, 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 1 brings about 3s 80c there, against 2s 50c at a vendor.