I have visited Costco @ Orange County, Seattle, Kirkland, Issaquah & 3 of the 4 in Hawaii.
I always spend a lot of time in the electronics dept. and question them on their latest cameras, TVs, computers, accessories, gizmos,etc. and am always pleased with the knowledge of the salesreps. Again, less selection to choose from.
Not a pumper, just my experience.
My experiences have been hit or miss with Best Buy & Circuit City. They do carry a lot to keep track of.