The annual white elephant sale (I've never been!) is in Oakland both Saturday and Sunday, they recommend parking or Barting from Fruitvale then taking the free shuttle to the sale.
The Fremont Borders is slashing prices again on their store closing.
The Alameda Antique Fair is this Sunday, weather permitting.
Lastly Jeremys in the city and Berkeley are having a 50% off all apparel sale both Saturday and Sunday!
Hope you find lots of treasures!