It's 843 at myeongdong today

Thanks much fishaye28 and Jane2, it looks pretty safe to say that changing there will at least be higher than changing in SG then.
Its @ the lane along Chinese embassy. Pls note all other changers offer pretty low rate.
Today arcade highest 835.42. But queue too long so I went ahead to change a few hundred for 835. Will be in Myeongdong on a Saturday afternoon, sure hope rates don't drop during the weekends.
Just change 838 at myeongdong last night.
oh no the rates are matching sg rates already!