Gluten Free bulk-goods?
Where to get Gluten Free flours, startches and Gums (Xanthan and Guar)besides Berkeley Bowl or Whole Foods?
Are you wanting bulk for price, flexibility or price?
Best prices (but cross-contamination ? I am celiac and have been OK but many are scared:
White rice flour - Thai brands from Asian grocery
Besan - Indian grocery
All-purpose blends - Trader Joes and Costco (Bob's Red Mill). Costco also has almond meal.
Whole foods has best prices on Millet or Sorghum flour, and competitive for Xanthan and basic all-purpose blends, believe it or not. Safeway now carries a store brand all-purpose blend, and Nob Hill/Raleys often puts them on sale.
But honestly I usually order online. I watch Gilt for sales on Cup 4 Cup 25 lb. bags, use Amazon for other things in bulk.
Maybe at El Cerrito Natural on San Pablo Ave between Panama and Sacramento Avenues. Their phone number is (510) 526-1155.