Scroll of Strength II

About 45s 97c on Beta · Horde (5 hours ago), 49s 0c on Beta · Horde (22 hours ago), and 3g 2s on Beta · Alliance (23 hours ago), from player scans. A vendor pays 87c, so the auction house pays 50.2× more.

1 recipe: Libram of Invocation.

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 5 brings about 2g 18s there, against 4s 35c at a vendor.