Intermountain Nursery

They specialize in California native plants. They encourage people to plant vegetation that is native to this area so we can reduce our water usage because we have such water problems here. They want plants that are easy to grow. By planting California natives you won't be struggling by trying to plant something that is foreign to this area. They also offer a lot of classes on things like plant propagation, growing fruit trees, landscaping, those types of things.
I think that 2 of the people that work there are California master gardeners. So they are very good. You can call them or show up in person to ask questions. 
I don't know on price. Every time I go I spend a different amount depending on if I am buying trees or shrubs or vegetables. They are kind of a specialty nursery so their prices might be slightly higher than the average nursery, but because you are buying such high quality plants it's definitely worth it.