Fine Leather Pants

About 19s 0c on Beta · Horde (5 hours ago), 66s 0c on Beta · Alliance (1 day ago), and 40s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 8s 29c, so the auction house pays 2.2× 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 18s 5c there, against 8s 29c at a vendor.