Posted By:
Hal LewisHaving them slabbed by SGC will also (if they are doing their job) confirm that the card:
1) is authetic and not a good counterfeit
2) has not been trimmed ever so slightly
3) has not been colored
4) has not been restored
5) has not been bleached
6) has no creases that can't be seen without close examination
These reasons are all IN ADDITION to the "unbiased grade" reason...
so consumers are obviously pretty confident in SGC and PSA if they are paying more for cards that have passed these tests.