Mystic's Shoulder Pads

About 4s 0c on Beta · Horde (6 hours ago) and 5s 0c on Beta · Alliance (8 hours ago), from player scans. A vendor pays 3s 46c, so the auction house pays 1.1× 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 3s 46c at a vendor.