Green Tea Leaf

About 1s 0c on Beta · Horde (4 hours ago), 1s 0c on Beta · Horde (21 hours ago), and 21c on Beta · Alliance (23 hours ago), from player scans. A vendor pays 14c, so the auction house pays 6.8× 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 20 brings about 19s 0c there, against 2s 80c at a vendor.