Battle Chain Girdle

About 1s 0c on Beta · Horde (8 hours ago) and 10s 0c on Beta · Alliance (10 hours ago), from player scans. A vendor pays 41c, so the auction house pays 2.3× 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 95c there, against 41c at a vendor.