Simple Dagger

About 2s 0c on Beta · Horde (22 hours ago) and 5s 0c on Beta · Alliance (23 hours ago), from player scans. A vendor pays 38c, so the auction house pays 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 1s 90c there, against 38c at a vendor.