hell-o
it's best to use the full http path to your agora.cgi file in the action. this way cookies will be set up properly as well as referrers.
so it will look something like...
http://www.domain.com/store/agora.cgi
there can be issues with the relative path
store/agora.cgi
it also makes it easier if using sub-directories you're linking from.
generally, when you have static pages like this with "buy now" buttons there is no need for any products in the database. it all depends on need and how you want youe site to develop. you can always populate your dB later if you need to.
when you click a "buy now" button off your static page you go directly to the "view cart" page in the store to view the contents of your shoppingcart. from there you can maniplulate your stuff, check out or continue shopping.
a non-dB store is just that. there are no products added to the store's database. all descriptins, price and options and other stuff is dependant on the data you send through your "buy now" button.
regards,
dan