I am surprised that stores in places like San Francisco let you in the store.

I am imagining concrete block buildings (even the truck ramp is enclosed) with a bullet proof kiosk and a one-way door to pass out goods purchased.

The only reason this is not the case is that certain stores have such a HUGE markup on items, that they are basically free.

In the 80s, lipstick contents 1¢, tube 1¢
The items in the dollar store used to cost between 10-20¢

And, in the future, if you had a community. The coop could be thing at 90% off, if bought by the pallet. Of course, people in coops usually do not buy things with such high markup. They buy raw goods like wheat.