First of all you should be thoughful about for what purpose you are going to use earphones. Then you probably head out to a media product selling shops and have a hands-on usage of various earphones of your budget there. There you should be able to experience of different earphones . I prefer you people to buy earphones that have rubber earbuds. After choosing the best one you like check its price at the store and then compare it from the online stores . Then you go for the cheaper one.
Points to remember before choosing the earphone:
1 ) make sure that the build quality is good so that you can use it for a longer period.
2 ) see the tangibility of the wires of the earphones.
The more is the tangibility of the wires the lesser you should think of opting for it.
3 ) See if you can find a flat wired earphone instead as it is more durable and less tangible.
4 ) Always go for a good brand so that you can have a warranty for it.
5 ) make sure you are buying the correct earphone for the correct purpose.
6 ) Go for earphone with no mic if you are buying it for listening music as the cost cutting of the mic will provide you with better sound quality.
7 ) Or go for a earphone with mic if you are buying it for talking or for both purposes.
Some of my favorite earphones that I use are:
Boat bass heads 225 ( 600rs)
Letv earphones ( 1300rs)
Samsung earphones ( 400rs)