Star is the big chain nursery store in the valley. Do they have the best prices? No- sometimes common plants are cheaper at a Home Depot or Lowes, but the selection blows them out of the water.
The staff is friendly, I asked the rental department several questions and they were extremely helpful, as well as an associate about artificial turf.
There might be speciality nurseries with a bigger selection or lower prices, but Star is a good place to get your project started!