if i can be brutally honest, i don’t think worrying about postage is your key issue… its giving your site greater visibility.
i buy everything on-line, and will spend quite a while looking for the best deal. i can’t ever recall coming across your site.
good plug though with this thread!!
as with the guys above i go on total price, so if with post its still cheaper i will buy.
my process for pricing is:
1. google shopping
2. ebay
3. google
also the annual/regular 15/20% sales that some places do ‘persuade’ me to buy things i maybe would not have done or buy stuff sooner than i would.