Defender Spaulders

About 10s 0c on Beta · Horde (5 hours ago), 10s 0c on Beta · Horde (22 hours ago), and 30s 0c on Beta · Alliance (24 hours ago), from player scans. A vendor pays 6s 67c, so the auction house pays 1.4× 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 6s 67c at a vendor.