White Leather Bag

About 15s 0c on Beta · Alliance (20 minutes ago), 18s 0c on Beta · Horde (6 hours ago), and 20s 0c on Beta · Horde (24 hours ago), from player scans. A vendor pays 8s 75c, so the auction house pays 1.6× 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 14s 25c there, against 8s 75c at a vendor.