Cross-stitched Vest

About 25s 0c on Beta · Alliance (3 hours ago) and 100g 11s on Beta · Horde (1 day ago), from player scans. A vendor pays 6s 83c, so the auction house pays 3.5× 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 23s 75c there, against 6s 83c at a vendor.