Data mining and scheduled update

I am in the first phase to define a project for online selling
Italian wine on the Singapore market. I need to:

- make a list of all the online websites available that sell wine
in Singapore;
- extract from these websites the data relating only the Italian
wines they sell, such as the name, year and price;
- extract general information on shipping prices, timing of
delivery
- if possible, understand the sales volume for these products
- after this first preliminary research, regularly check all these
sites for updates on new wines and prices