google site searches from web page

this will be a web search function that will be run from a webpage. the search function maybe a google: product price * site:www.someinternetstore.com. the multiple sites being searched(approximately 200) are in a list on the webpage. for each site searched, the product sell price should be returned. rank the site with the lowest price at the top line of the list along with lowest price amount, and the number of times the site ranked first place. probably php will be the best choice to use to parse the results for the lowest price. the platform is centos5.2, LAMP. if this is a doable project please respond with your questions or comments.