As long as you buy from sellers with high feedback levels, you should be alright.
Uh I'm sure if you buy from someone with good feedback/etc then you'll have a good sale.
Except for frauds who run up their ratings with many inconsequential purchases (eBooks, playing cards, etc. etc.).
Or groups of fraudsters that make shill purchases from each other to increase their feedback.
Or accounts which have been hijacked...
Or...
Remember that you always have paypal to protect you
You don't always have PayPal protection. Read the fine print.
PayPal and eBay buyer protection comes with strict limits - for example, if they ship you something that wasn't as described (but actually did ship SOMEthing), or if they are a non-verified PayPal member, or if they clean out their PayPal account right after you pay, and the cash is non recoverable, or if they string you along on shipping until the claim period has expired. Also it does nada for you if the seller talks you into doing a money order or wire transfer or some other non-recoverable payment method.
Remember that the feedback system is a peer pressure mechanism only - if the fraudster is planning to close their account anyway, it means absoluterly nothing to them if they are given bad feedback or banned from eBay. Feedback is a deterrent to bad behaviour only if you are an honest and continuing eBay member (ironic, huh? The good sellers are those most hurt by malicious feedback, and it doesn't fizz on the thieves at all).
That was some particularly naive advice, there, mates.
Question: Why would you even consider taking the chance on eBay when you can buy an Apple Refurb with 1 year warranty?
Think about it: Especially with 'new' MacBooks on eBay - Dealers wholesale cost is about 5% less than Apple Store retail. How much sense does it make that random people on eBay have large supply of 'new' Apple product to sell at a discount? Unless they are not new, or stolen, or nonexistent.
How many people actually win new Apple machines in raffles, or get given new machines by their boss, or accidentally ordered 2 units, anyways (to quote three of the most overused excuses)?