I know for a fact that EOS D30's are THE item of choice at the moment for con-men. There are loads of D30 auctions on ebay at the moment, and especially over Christmas, all being sold by new users with no feedback profile, all looking for payment by Western Union etc.
They are scams, and I am 110% sure this one is too, I would stay well clear.......Remember if it looks too good to be true it is.
If you insist on buying it, then you must use an escrow service, try www.escrow.com and at least you have some protection for your money, otherwise you will send the money and I promise you will never see the camera.
To contradict the others slightly, ebay is a very safe place to buy from overall, I bought my old Dynax SLR from there, but you must know who you are buying from, check out the feedback profile, if they don't have one, be very cautious, email the seller, get gaurantees in writing for slae/return policies, and if you are uneasy use escrow. There are lots of reputable sellers on there, so don't be put off........just beware the D30 is the con-mans choice at the moment.
Canon through and through