Every turn down every aisle at the San Jose Super Toy Show fills me with an inescapable sense of product lust. I understand why I want the 19 1/2-inch Shogun Warriors Godzilla doll. Sure, it’s going for $600, but it has a spring-loaded fist that can launch across the room. What I don’t get is why I want the Star Wars Early Bird Certificate, a symbol of childhood disappointment.