Hi all, My first post here. I just recently bought a used mac pro. The machine was still under original Apple warranty until Oct 5, 2008. I'm thinking of getting AppleCare and I saw on eBay there are several sellers selling the AppleCare for Mac Pro for much cheaper than the Apple Store price. Curiously, the seller will send only the registration code by email and not the box or papers. My question is... are those sellers legit? Also I notice they're selling the "old" AppleCare which has part number MA516LL/A and the current one at Apple Store is MB586LL/A. Are there any difference between the old and new one? Thanks in advance.