I want to start up a price compare site for our club.
The meaning behind it is that all shops who sell products to members of the club can easely enter there products, and after it the members can easely take a look where wich product is the cheapest and if it is in stock etc.

You can kinda compare it with a site like : http://www.preisroboter.de : you enter something you look for ( lets say : mares puck ) and while entering it, you already can see products that match your product. When pushing the Suche button, you get the results.
I would like to have kinda the same results as output.

Input by the shops will be done thru some kind of csv file they need to upload.
csv file needs to have the following fields : productname, info field, link to picture and price

My first idea is that this all runs on a mysql DB.
And that shopowners can upload the csv file thru the website also into the DB.