"But, if you know where to sell 1950's wheat cents in EF for .20 cents, please let me know."
The price I quoted is an "average" retail value. It was taken from the May 2005 Coin Prices magazine and represents the approximate price one might pay if one were buying it from a dealer.
Perhaps there is a rough "Rule Of Thumb" for figuring the price one might get if one were selling to a dealer? Maybe stated as a percentage of retail for those without access to Grey sheet information? This would be much more helpful than a lecture on semantics.