The last couple of weeks I have spent a lot of time in the uppper Sunset. New Wing Sing has two location on on Judha and 9th the other in Chinatown on Stockton. New Wing Sing is one of the better take out place in San Francisco.
The normal price of take out dim sum in Chinatown is 3 for either 1.00 or 1.10. The location on Judha is have a dim sum sale the price is 4 for a buck. You need to get there early in the day because dim sum that sits too long is not a good thing. Also they sell quart size jook (pork and preserved egg) for 1.75.
Take advanace of this sale. This one of the few times you can beat Chinatown prices.