Go to the areas in your city where you get electrical parts cheap. You are bound to get these LEDs and LED strips cheap there. I got a 5metre warm white led strip for 220 bucks and a 12v adapter for 60bucks (for connecting to the mains). Also if you are buying a long strip, double check to see that all LEDs work properly. Afaik, 1m led strip is only 60.
For Amdavadis, go to Gandhi Road. You will see lots of shops with led strips hanging outside. If they try to charge you 250+, bargain or walk away.