I've been looking at buying a rev. c 12" powerbook (looking on ebay, apple refurb site etc.) I know that a refurb powerbook purchased through apple can obviously be enrolled in applecare, but what about a powerbook purchased on ebay (assuming it is still under the original one year warranty)? Would I just need to ask the seller the original date of sale? Would I need copies of the original sales receipt? Thanks for any help in advance!