It's obvious scam, don't buy from this user. Director of this ''phone comapny'' was arrested last year:
https://money.cnn.com/2017/02/24/technology/india-4-smartphone-freedom-251-founder-arrested/index.htmlEven in China phones aren't that cheap. I was looking for phone in Chinese shops and found cheapest smartphones costs between $30-$40 and it has 1GB RAM and 8GB ROM, same like model mentioned in op. Well. for $20 you can buy copy of new Nokia 3310, but phone for $4 is impossible. You barely can find silicone case for phone for such price