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 Vice-President of India is ex-officio Chairman of Rajya Sabha. Rajya Sabha also chooses from amongst its members, a Deputy Chairman. There is also a Panel of Vice-Chairmen in Rajya Sabha, the members of which are nominated by the Chairman, Rajya Sabha.