[White Borders]

Most of my collecting the past few years has been on T cards (T206 in particular). But I enjoy learning about the other cards as well.

I've been spending some time becoming familiar with the E90-1 set, but there's something I don't understand:

For McLean, Shean, and Upp, both PSA and SGC gives them weighting factors of 1 - 2 for their registrys. But when I look in the Standard Catalog (2009), I find that they are valued at about 14 times that of a common.

Can someone please explain why there is such a discrepancy between the PSA/SGC weightings and the Std Cat value?

Thanks for your time and best regards,
Craig