Could you list a few of the many? I looked around Bay Area airports, and found most of them selling 100LL:

  KSFO - San Francisco International Airport - $9.90         
  KHAF - Half Moon Bay Airport - $6.42                       
  KOAK - Metro Oakland International Airport - $8.21/$8.64   
  KHWD - Hayward Executive Airport - $7.99/$7.55             
  KPAO - Palo Alto Airport - $6.35/$6.95/$6.59               
  CA35 - San Rafael Airport - $6.84                             
  KSJC - Norman Y Mineta San Jose International Airport - $10.07/$8.95  
  KLVK - Livermore Municipal Airport - $6.54/$7.54                
  KCCR - Buchanan Field Airport - $7.15/$6.98                   
  KDVO - Gnoss Field Airport - $7.67/$7.87                         
  KAPC - Napa County Airport - $9.20                                
   0Q3 - Sonoma Valley Airport - $8.00                              
   C83 - Byron Airport - $6.35                                  
   0Q9 - Sonoma Skypark Airport - $6.30                  
   O69 - Petaluma Municipal Airport - $6.95