You will get best Laptops under Rs 30000 in India. You can choose any from them and then buy your best and simple laptop under Rs 30000.
These Laptops are available on popular E-commerce sites like Amazon, Flipkart etc. So You don’t need to go to local retailer 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 Laptops exclusive on e-commerce sites.
But if you know someone where you can get these Laptops offline then try to bargain as well.