You can't beat Lumia 520 for 7.9K right now at flipkart. Currently I am using Micromax A58 and Karbonn K9. I Have used Asha 501, Asha 210, Asha 201, X2-01, X1-02 and Lumia 520 . All these budget phones from NOKIA are much better when it comes to quality hardware comparing with cheap androids. Trust me, Lumia 520 has no match in its range. Don't buy it only if you are an app junkie , else go for it
My vote would go to the Nokia 525 over the 520 though some may question whether its worth the 2k extra over the 520. Still, it is under 10k which makes it a great deal IMO...