I bought an avionic 20A esc and a Wolfpack 1800 mah 2S (2 cell) Lithium Polymer battery without a motor and prop for building a scale model.
But I have a doubt of choosing a brushless motor which is not very expensive but give power enough to lift a 400 g plane and a proppeller which gives maximum thrust off it. PLEASE  ME.

Emax CF2822 1200kv (under Rs 600) and a 10x6 will fly a 400gm model easily.*
Or a Turnigy 2826-10 1400kv.
Provided it is a trainer with wing loading of not over 200-250gms/sqft of wing area.
Not a scale Spitfire, Mustang, Rare Bear etc.

Moral: build a trainer before you build a scale model.

Edit: * with a 2s lipo.
Both these motors can do much more on 3s.

Or you can get a avionics motor one of those micro motors you know.
They are wonderful.

Sir,
     Can you select one from amazon.in , im sorry but that the plane im going to build has about 500 gm including every thing. I need it from amazon as it has cash on delivery option for electronics.