Scroll of Protection

About 25c on Beta · Alliance (11 hours ago) and 25c on Beta · Horde (11 hours ago), from player scans. A vendor pays 25c, so the auction house pays 1× more.

1 recipe: Tenets of the Silver Hand.

No. It is in Classic Era too, with the same item level, vendor price and stack size.

Sell it to a vendor. A stack of 5 brings 1s 25c there — more than the auction house nets after its 5% cut.