I have to say. From my experience working in the coin business I would have to say that cointrackers.com is a site that puts out more misinformation than truth. For example I had a customer call the store today asking if we buy 1983-D washington quarters. I simply told him, "no" they minted over 600,000,000 there is no silver content in the coin and they are all over the place in circulation. He then proceeds to tell me that cointrackers says that the quarter in question is worth between $11-$42. $11 in poor condition and $42 in excellent condition. After taking a glance in the red book I see that $11 dollars is what you would expect to pay retail for a certified 1983-D in MS-63 condition and $42 in MS-65 condition. So I am assuming that based on the numbers coin trackers is providing and what is printed in the red book the author of these pages are simply taking the lowest number they see and the highest they see in the red book and using those prices as actual value of the coin in poor and excellent condition. I do not believe coin trackers to be a reputable source of information when it comes to coin values. And they do not reflect actual values, based on the current market. There is much better information out there regarding coins and there current values, and in my opinion cointrackers.com is not one of them. If you really want a better guide to actual market values get yourself a membership the the grey sheet. Prices are updated regularly and reflect what you can expect to get for a coin and what you may have to pay for one.