Tattered Cloth Vest

About 10s 0c on Beta · Horde (9 hours ago) and 10s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 9c, so the auction house pays 106× 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 9s 50c there, against 9c at a vendor.