I was in Beijing at Alice My Tailor (Sanlitun) and was also quoted an astronomically high 1200rmb for a suit. I'm not sure if that's now the going rate or what, but only after I'd explained I'd previously purchased a suit for considerably less was I able to talk the young lady down. At the end of the day I walked away with 4 shirts and a suit for 1250rmb, quality good not great...