Mighty Chain Pants

About 1g 35s on Beta · Alliance (21 minutes ago), 1g 15s on Beta · Horde (6 hours ago), and 1g 20s on Beta · Horde (24 hours ago), from player scans. A vendor pays 12s 21c, so the auction house pays 10.5× 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 1g 28s there, against 12s 21c at a vendor.