$1900 max? I see $2500+ 1 bedrooms in the Mission every day that aren't nice at all...
I would guess, based on how wildly inaccurate usaar333's data would be otherwise, that he or she is referring to getting a single room in a multi-bedroom house/apartment, not a full one bedroom apartment. Even the Richmond has 1 bedroom apartments that run over $1900/mo.
depends on where. lived in russian hill for 10 years and though fortunately i was locked in with rent control, the people across the hall from me were paying $3300 a month for a large (1200 sq feet) 1 bdrm identical to mine (parking not included)