Yeah, it does. But most people don't even notice that.-The current price guide obviously hasn't been updated for at least 3 years, doesn't this point to an apparent problem?
Again, simple - because it helps them make money. That and that alone is the primary reason that price guides even exist. Also, it costs a great deal of money to build a price guide with any degree of accuracy. They would rather do what they do than spend that money.-If they are not going to maintain the accuracy of the price guide then why do they continue to post it? It's junk, either put some effort into maintaining it or do the responsible thing and take it down.
Now then, let me point out another issue. You pick a coin like a '41-S Walker in MS65. Actual realized prices, within the same time period, vary within a range from $575 - $977. Or a '27-D SLQ in MS65 FH, realized prices for that one vary from $1955 to $3737.
What kind of price do you put in the price guide for those ? Answer - you can't. And the reason you can't is because the prices are 100% dependent upon the coin itself because every single coin there is, is unique. Almost all coins, even in the exact same grade - one can easily be worth double what the other is. And that is without any attractive toning to muddy the waters even more.
This is one of the biggest reasons why price guides are worthless.