How Safe is eBay.ph?

For the past few weeks, I have been searching for the perfect laptop that could fit my budget.  I had bookmarked a lot of items already.  It's really hard to choose especially when money is involved.  I have come across this ebay.ph item that offers a Sony Vaio s460 laptop for only $450.00.   Mind you, it already includes the shipping fee.  I'd say this is too good to be true, but what if it IS true?  This is really one hell of a deal.

I have been in correspondence with the seller via email, that he replies instantly. Also, I had received emails coming from "ebay".  Is there such thing as an ebay safe harbor department that could mediate and assure you safe transactions?  Instructions say that I should wire the money via western union; that the package would be delivered via UPS Air and that we will be using the seller's account so I should not worry.  Are these reasons valid? 

The seller seems to be cautious too since he has too many requirements, but could these be just fronts?  Another reason why I still have doubts is because an s460 laptop to be sold for $450 is way too cheap.  Anybody who already have an experience in dealing online and offshore?  I would like to make sure.  If this is a valid transaction, I don't want to pass up the opportunity.