The NGC US Coin Price Guide shows average dealer retail prices compiled from independent sources across the numismatic community. The values shown are based on actual, documented market transactions reported by collectors, dealers and auction houses for NGC-certified coins.
The Rajya Sabha members are elected by the method of proportional representation by means of the single transferable vote (STV), very similar to how the members of legislative councils in states are elected. Members keep retiring after their 6-year tenure and elections take place as and when there is a vacancy.
The President is elected by the Electoral College composed of elected members of the parliament houses, the Lok Sabha and the Rajya Sabha, and also members of the Vidhan Sabha, the state legislative assemblies. There have been 13 presidents of India since the introduction of the post in 1950.