SGC 92 value = $1600. SMR Value = $1100. The typical range for a PSA 8 would be $900 (low-end) to $1200 (high-end).
As can be seen by these key examples, SGC cards -- even those from the 1950s and 1960s -- have overtaken the values for similar PSA graded cards. And with the drastic loss of confidence from the current PSA scandal, I expect this gap to widen.
For those who are interested in pricing more vintage SGC graded cards, here is an interesting article and list of key vintage sports card values: