Coarse Dynamite

About 9s 24c on Beta · Alliance (6 hours ago), 8s 48c on Beta · Horde (12 hours ago), and 15s 0c on Beta · Horde (1 day ago), from player scans. A vendor pays 75c, so the auction house pays 11.7× 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 1g 75s there, against 15s 0c at a vendor.