Pre 65 Redbook Values And Silver Spot Prices

Thanks for the reply Ty2020b.
The reason I ask is that I just picked up some pristine proofs on my weekly trip to my LCS for my junk silver. The dealer informed me that they just came in. Nice quarters
and dimes. They were obviously just out of the packaging.
This is what I picked up;
1958 PR Quarter and dime
1959 PR Quarter and dime
1964 PR Quarter x3 and dime x 3
2006 PR Quarter (CO) and dime
2007 PR Quarter (WA) x2 and dime x2
2007 PR Quarter (UT) and dime
2007 PR Quarter (MT) and dime.
FV for Constitutional silver was $22.50 that day making a quarter about $5.63.
For example, RedBook lists the state coins @ $8 for PF-65. The lot of these are are at least into the 63-65 range.
It just appears to be a bargain and that people are prematurely dumping their silver. Good for me I guess.
2021 RedBook.
Any thoughts?
I suppose it would be prudent to find out silver spot price at the time of edition. Pretty sure somewhat less.
I should have looked at the halves right? They were not my quest that day and regret the oversight now Oops.

The answer is yes and no.

What was the spot silver price when those coin values were established?

The 2021 RedBook was published in April 2020. It went to print in 1q 2020. Prices were established during the later part of 2019.

Spot silver in November 2019, fro. 18.124 to 16.807...