how to buy

hello,i was wondering how to buy this modul arduino.How much is the modul cost? I would like to make a logger to this modul and connected with sensor such as ph,salinity and humidity, and display it at lcd tocuhscreen. Is that possible. How much this all cost also?

Look for a local supplier: Distributors — Arduino Official Store

which is the best location should i buy this modul for indonesia?please inform me