price comparison with cart (without check out)

[housecase]

Hello ,

I want to modify the oscommerse to a price comparison service

 

of offline shops and maybe some online , anyone have done it before ?

basicly i know i have too add columns to product details but i didnt see a way to do this ...

also there is away to export data from excel sheet for

 

example in order to enter the products faster ?

Thanks