United States Mint coins are a good investment option because of their design (eagle design), especially for gold bullion coins. In addition, the United States Mint produces a range of commemorative coins that transcend their intrinsic metallic value. For those looking to invest in gold, a Gold Investing Guide can be a great resource to help understand the different options available. And in a post like this, with an audience that spans the gamut in terms of tax bracket, I think trying to find a way to include taxes in the equation is more complex than it's worth.
In the future, I think I'll be more likely to set more expensive coin games to buyers' clubs and risk selling on my own with coins under one hundred dollars, unless the fixed profit margin is quite high. I expect these United States Mint coins to increase in value every time there is an immediate resale opportunity, such as those mentioned above. Buyer clubs wouldn't offer to set a profitable price if they didn't expect to sell for even more money. Any opinion expressed here is just that, an opinion and reflects a personal buying preference for investing in currencies. I think I didn't actually open the box of those two silver coins that were too tall, but in retrospect it was foolish, since I had no way of proving that I ever had the coins in my possession, so if the buyer claims that I sent him an empty box, it would have been more difficult for me to prove that I had them in the first place.
While some will say that PFS is only trying to increase their own profits (and it is clear that they are in business to make money), the other side is that there is a certain value that the buyer you sell to does not extend too much to the point where an error in their estimated value costs them so much that they cannot meet their obligations to all buyers.