You will get best RO Water Purifiers in India. You can choose any of them and then buy your best and simple RO Water Purifiers.
These RO Water Purifiers are available on popular E-commerce sites like Amazon, Flipkart etc. So You don’t need to go to a local retail store.
However, I will suggest you go to near retailer what if they are selling at low cost then you can save your little amount of money. Now, brands are competing with latest specifications and they sell their RO Water Purifiers exclusive on e-commerce sites.
But if you know someone where you can get these RO Water Purifiers offline then try to bargain as well.