67cammy,

   There are several professional coin grading companies; the two I am most familiar with are NGC and PCGS. Both are highly respected professional coin grading companies you can trust to accurately grade a coin. If I were buying a coin sight unseen, these two companies would be the two I'd trust most; but, there are other companies that are reputable, but I've only bought coins graded by these 2 companies. I've collected coins for over 40 years and I would have no hesitation in recommending these two companies. Markcs1956@aol.com