I buy most of my hobby stuff from Brookhurst Hobbies in Garden Grove and Pegasus Hobbies in Montclair. They both have massive 1/72nd scale figure selections. Brookhurst probably keeps 1,000 boxes of figures in stock and Pegasus probably 10,000 boxes in stock. They both sell HaT, Red Box, Pegasus, Revell, Italeri, Orion, and all the major and medium companies. I get a few online from a couple places too. Neither shop is close, Brookhurst is 15 miles away and Pegasus twice that or more.
I would rather go to a shop, but sometimes the price or buying a large amount is easier on line.
Mike "Bunkermeister" Creek