Lifeless Stone

About 3s 98c on Beta · Horde (9 hours ago) and 3s 98c on Beta · Horde (1 day ago), from player scans. A vendor pays 3s 60c, so the auction house pays 1.1× 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 5 brings about 18s 91c there, against 18s 0c at a vendor.