I sell a lot of anime DVDs on eBay, and I have 
noticed a lot of bidders with zero feedbacks 
bidding on my auction. 

Anyway, to focus on your concern. To avoid 
getting cheated by dishonest sellers, my advise 
is to look at the date that the zero-bidder is 
registered. You have to look at this especially 
if you are bidding on something expensive, or if 
the zero bidder out bids it's components 
immediately after he or she gets out bidded for 
numerous times. If the registered date is 
immediately after the beginning of the aution and 
this person is bidding like crazy, then you 
should be careful. Of course this isn't the case 
most of the time, but it's good to know what to 
do when you runs in to something like this.

By the way, I'm going to stop selling stuff on 
Ebay, especially expensive cels, because they 
raised prices on everything. WOOHOO, what a smart 
move EBAY!! Can we say "Chapter 11?!?!?"

-manslayer