If you are closing the auction because you got an 
offer, I'd first make sure the person who made 
the offer was the high bidder.  I'd be kinda 
bummed if I were bidding on something and I was 
the high bidder... only to have the cel sold to 
someone else.

After that, if anyone emails you about closing 
the auction early, just tell them someone made 
you an offer you couldn't refuse.  

jINx