I think this is not a fair feature. Either I will 
do an auction or I will not. And I think that 
sellers not only end auctions early if they get 
no bid but also if they get a good bid besides 
the auction.
In this way I missed three wishlist cels within 
two weeks, and this was really frustrating!
So if I want to bid for an auction and I know the 
seller usually is ending his auctions early, I 
make a bid at once to prevent this ^^