Well thanks for lowering it. If you verify your account in more ways it will also help. This is a great coin and I want you to get as much as you can for it. My sister had a min pin for 16 years and unfortunately we had to put him down over the summer. He was such a beautiful and smart dog.
Well, if it is the coin I saw listed - I listed the site below - you can have it weighed, or weigh it yourself. It should be 26.7300 g. That will tell you the weight, and you can have it tested at a coin/pawn shop. If the weight is correct, you are probably ok, and it should be 90%. http://moderncommemoratives.com/2004-lewis-and-clark-silver-dollar/