OTAKI, New Zealand (AP) - Sandra Vidulich is so excited about the leather boots she ordered through Amazon that she rips open the box in front of the postman and tries them on. "I looove them," she declares, as the driveway at her tree-lined home in rural New Zealand briefly becomes a catwalk. "They're cool." For now, a boom in Internet shopping is helping keep alive moribund postal services across the developed world. But the core of their business - letters - is declining precipitously, and data from many countries indicate that parcels alone won't be enough to save them. The once-proud postal services that helped build modern society are scaling back operations, risking further declines. The United Kingdom is preparing to wash its hands of mail deliveries entirely by selling the Royal Mail, which traces its roots back nearly 500 years to the reign of King Henry VIII.