Professional Grading Question

[xdrx]

Well, I just rec'd my initial 10 cards back from SGC. Somewhat disappointed and definitely confused by the grades. Most are lower than I expected, but some just don't make any sense when compared to the others. I really don't have much faith in SGC based on this submission. I think I'll give PSA a shot next.

One question: A bought quite a few cards from a dealer back in the day who used to write prices on back in pencil. Small (as small or smaller than card number digits) and light, but still visible. I haven't tried to erase those markings, thinking I may cause more damage than harm and because I don't want it to seem like I am altering the card. What are your thoughts? How much do the pencil markings take away from grading? Should I try to erase?

Here's an example:



Thanks.