I was @ Billu's yesterday; Powershot S100 hasnt yet arrived here!
There are major supply issues; I guess due to changing dollar rate and supply issues in official providers. Even routine items like EF-50mm f/1.8 and 430EX-II were not easily available. 50mm f/1.8 that used to be of 9.2k/ 9.5k was 12k, 430EX-II that used to be of 23.5k was 26k / 27k and that too were imported by shopkeepers themselves (just shop warranty)