Searchbay is a script I am currently working on, which will be enhanced as time goes by.
The ability to search by price and by postcode should be available quite soon.
I intend to implement various improvements, which could well involve news, trends and the like.
I like working on such projects. Keeps my old brain feverishly working away, which cannot be a bad thing.
Aspects of the script could be used to enhance a website, or to specialise in certain categories of products or as a complete site, such as this one.
Behind the scenes there is a sitemap creator page, which outputs watched items (popular items) and then submits the sitemap URL to Google and Bing.