Pattern: Rich Purple Silk Shirt

About 50g 0s on Beta · Alliance (6 hours ago) and 5g 6s on Beta · Horde (7 hours ago), from player scans. A vendor pays 3s 50c, so the auction house pays 1,357× 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 47g 50s there, against 3s 50c at a vendor.