I've bought stuff for my PC from sites like Amazon and Croma. Haven't tried buying GPUs though because I've heard one usually ends up returning those.
Techies from India- suggest websites from where I can buy for cheap. I'm ready to experiment with new websites too!

The Nvidia GeForce GTX 1660 Super for video editing, daily tasks, or even gaming at 1080p it will do very well and render everything at reasonably high settings/fps.