Dear All,

Bit of a puzzler this one, I'm much in need of your advice and opinions!

I look after the SEO for a large, dynamically driven database site.

This site ranks well for selected terms in Google/Yahoo/MSN.

However, in Google about 90% of the pages indexed are only shown as supplemental results.

The problem I have is that to get to the "Used products" section of the site you have to use a form to specify which type of products you want to view. Then, after you have narrowed down your search, a list of products are displayed, each one with a quite awful, un-user-friendly URL with about 10 parameters (the site is .asp based).

I know we can implement some URL re-writing techniques to make the pages more spiderable but I have two questions:

1. How can I get these dynamic pages spidered by Google when you have to go through a form first to narrow down your search for a product?

2. What happens if Google was to index these pages and then a few days later the product is sold and (I'm assuming) the URL no longer exists? I don't want to spam Google with a lot of product pages that lead to a 404. Any ideas?

Thank you in advance for your time,

Best wishes,

Nick (UK)