So that it's recorded somewhere that at least *I* can find easily, from this PC World Article:

Sometimes the best e-mail and chat support in the world is no substitute for a conversation with a real person. But that kind of talk isn't cheap, so to cut costs, Net-based companies like Amazon often make their phone numbers hard to find. Not to worry: A site called Cliché Ideas has dug them up:

Amazon: 800/201-7575
EBay: 800/322-9266