20% Getting less while buying Bitcoins

[spada]

Hi, i'm new to Bitcoin, When i try to buy Bitcoin from Zebpay or local Bitcoins, i'm getting 20% less worth Bitcoins. If i Buy Rs.5000 worth bitcoins, i'm only getting 3800 to 4000 worth Bitcoins. Why? What is the use of Bitcoin if 20% is getting deducted? 

[Quartx]

You are purchasing a crypto with fiat, people in cryptos do not like or want fiat. So you pay a premium. Pay $12usd get around $10 usd worth of cryptos after fees deduction. The same logic applies when u buy amazon gift cards from others selling them , you will usually pay 80% of the gc's actual value. Fees also change depend on exchange or services used.

[malami]

There are differences in prices across exchanges and countries. In Japan they are trading at 3000$ while on Bitstamp they are only at 2600$ and I heard they are at $4000 in Korea.

The best you can do is search for the best deal.