Bright blue or yellow leather purses, slim brown leather wallets, cavernous leather luggage, silver-tipped leather belts, and leathery ostrich-skin ashtrays: These and more can be purchased at Leather World. The colors and sleek shapes attract the eye first, but the divine smell draws you farther into the store. A cool professional sales staff and leathers from all over the world and prices that make you ask: Why are the insides of cattle so cheap and their outsides so expensive?