Yamaha has re-launched the R15 Version 1.0 as R15S and it is priced @ Rs. 1,14,741 (ex-showroom Delhi).
The older version of Yamaha R15 is not currently available for sale in the showrooms. You can buy the model from some used bikes portal like OLX or Quickr or you can contact your nearest used 2-wheeler dealer. Its suggested to get the bike checked from a trusted mechanic as the performance bikes are exploited wildly by their owners and if not taken care of, they can be a burden on your pocket.