The Bristol Farms on Beverly/Doheny has an interesting meat display for anyone wanting to eyeball the visual differences between grades of meat.
There are three displays of standing rib roasts at different price points: choice, prime, and prime aged meat.
It is a pretty good illustration of both why aged meat is more expensive and why I should start playing the lottery.
The Whole Foods at Fairfax and Santa Monica has by my last count, 16 different animals or birds for sale. Pretty impressive, especially the tasty looking capon.