You definitely haven't given them enough time.  I 
know I sniper every once and a while - but my ebay 
email is tied into an email account my sister and 
mother also use and only one person is allowed on 
to it at a time so sometimes I have to wait to 
get to it.  Also, I am not able to access personal 
email at work.  So, there could be similair 
reasons why your bidder hasn't contacted you.  If 
by late monday they haven't contacted you, then 
you should try contacting them telling them if 
they don't reply/pay then a non-paying bidder will 
be filed and if still no reply then a negative 
feedback.