1. Enter game
2. Identify your unid item fast
3. Open trade window
4. Press ALT + F4
Rollback tadaa.. item unid again
Original Thread: Sell your crap unids for a good price - Forums - Diablo III
Didn't put this in exploit forum, as I haven't personally tried it yet and unable to do so. However, people in the original thread have confirmed it, so it may work.