I think that if we sell the coins on E-Bay, otherwise known as Flee-Bay, we are making the situation worst. If you want to sell a coin sell it to someone that is a cacher. Someone on here. I also use a metal detector and love finding old tokens. But the best way to drive their value up is selling on Flee-Bay. BTW, I know one guy that has come across 5 geocaches with his metal detector. The last one he took a Susan B. Anthony dollar coin. He doesn't put anything in either.
Terry