I have used Amazon quite a few times. They never have disapointed me once. I have ordered from both the Amazon site & the Marketplace (used stuff from sellers). The Marketplace is very similar to E-Bay. They all have feedback, so if you don't see good feedback, then don't order from them.
I suggest you get the slightly more expensive shipping (unless you have a locking mailbox). Cause one time I ordered some stuff. It said that it had arrived, but I never got it. I think someone took it out of our mailbox. This was before we got a locking mailbox.