Pattern: Big Voodoo Mask

About 6g 16s on Beta · Alliance (14 hours ago) and 1g 0s on Beta · Horde (18 hours ago), from player scans. A vendor pays 10s 0c, so the auction house pays 58.5× 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 1 brings about 5g 85s there, against 10s 0c at a vendor.