Scroll of Strength II

About 49s 0c on Beta · Horde (5 hours ago) and 3g 2s on Beta · Alliance (6 hours ago), from player scans. A vendor pays 87c, so the auction house pays 53.5× 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 32s there, against 4s 35c at a vendor.