I work extensively in the West Los Angeles area and am a long time business owner and resident here.
Prices vary, as others have told you and much depends upon where you want to live. In Culver City, the average home is priced in the 700-800 Thousand Dollar range, but they can go higher. To give you an example..a home priced at 750,000 will have a monthly mortgage payment of approx.$3,792.41 that is with a 20% downpayment and the current interest rate of 6.5% (30 year fixed loan). Interest rates change weekly however so that is just a rough estimate.
We do have loan officers in our office who will give you an exact figure if you are interested.