i'll b honest...personally, for myself...i hav 
kept the shipping prices the same pretty much 
ever since i started cel collecting...i won't 
charge a ridiculous amount over the actual 
shipping price...i would go about 1-2 dollars 
over...my reason for that would be to cover a 
fraction of the gas money to run to the post 
office and back (1-2 dollars on a single cel 
won't really help THAT much, but if u combine 10 
cels sold, that does make a difference..)...some 
people may not have a post office within their 
convenience so that would help them a lot...i 
normally ask my bidders to use money orders, but 
i also know a lot of bidders use paypal to pay, 
so as we all know paypal charges a certain 
percent to the person receiving the money for 
using their account...i know ebay doesn't allow 
sellers to inflict paypal charges on bidders, 
but i know sellers do raise the shipping prices 
for paypal charges...i dunno...this is what i 
think...ok ja~