With maintage max of 12000, wouldn't the Proof Eagle be a better long term gamble than the Buff with a 300000 max? Or will the Bison mystique override the lower mintage of the Eagle? Talking 2006 here.
It probably isn't really going to matter. If they haven't been blesses by a major TPG as a 69 or 70 there really isn't any great interest in the proof gold eagles. Right now the 2006 is high because it is new but when you go back to 2005 and earlier there is really not that much difference in price for the proofs in the government holders and not really that much over bullion. But the 1986 had a mintage of over 400,000 down to a 2005 around 30,000. (by the way the 12,000 mintage for the 2006 oz is NOT the maximum mintage. It is the maximum for the individual coin. There will be many more made for the four piece set and the 20th anniversary set. The total mintage will probably be somewhere close to the 30 some thousand made in 2005.) I think in the long run tere will probably not be that much difference in the prices. Short term the Buffalo may be higher simply because it is new an different, but I doubt if it will be able to hold the premium.