Large Rucksack

About 3g 38s on Beta · Alliance (14 hours ago), from player scans. A vendor pays 25s 0c, so the auction house pays 12.8× 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 3g 21s there, against 25s 0c at a vendor.