Formula: Enchant Bracer - Lesser Spirit

About 3s 0c on Beta · Horde (6 hours ago), 3s 0c on Beta · Horde (23 hours ago), and 3s 0c on Beta · Alliance (1 day ago), from player scans. A vendor pays 2s 50c, so the auction house pays 1.1× 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 2s 85c there, against 2s 50c at a vendor.