Advice/Help on search engines

[herronial]

I'm looking to create a website that works on a similar pricipal to Kelkoo (www.kelkoo.co.uk) or any of the other hundreds of internet companies that compares prices of products. A site such as this revolves entirely around the search engine, so therefore it is key for me to find the best way to set this up.

However I know very little about search engines, and would much appreciate some advice as to what search engine software would best suit my needs and how basically a feature such as that would work (i.e. would i need to construct my site in a certain way)

It would need to be able to sort the results by price, as well as include options to filter the search by a maximum price, etc. (for example similar fields that you will see on an ebay advanced search).

I really would appreciate any advice or input whatsoever.

Thanks in advance

[herronial]

I sent an email to PicoSearch to see if it was possible to do it with their software but they sent me this response:

"With PicoSearch you can use Partitions to search separate sections, but you cannot rank by prices. You'll need special software on your database to do that."

Anybody know anything about search engines that could tell me what sort of software i would need?

Thanks