Sgc

[kmac32]

no, not really. All the cards Ihave sent in came back exactly with the grade I expected. I think they are strict but fair and unbiased. All of my graded cards are SGC so I pretty well know what to expect.

Kmac

[toledo_mudhen]

I think SGC is still as consistent as always.

I do know that my crossover rate from PSA to SGC is only running at around 25%

[bnorth]

I had SGC grade 12 cards a month ago and would say all 12 where spot on. I just had PSA grade 5 cards and 4 where 1 to 2 grades over graded and 1 was 1 grade under graded.

[vthobby]

Originally Posted by toledo_mudhen

I think SGC is still as consistent as always.

I do know that my crossover rate from PSA to SGC is only running at around 25%

I also have always found them to be the most consistent from year to year. Uncanny really but I am thinking maybe they do not have as much turnover on their actual graders? Less graders probably also helps the consistency.

Mike

[CW]

Based on what I've seen over the past couple years in eBay auctions, yes, it does appear that SGC is a bit tougher across the board. Everyone's going to have their own perception or opinion, though, so unless a thorough, unbiased study is done (which is virtually impossible) we'll never truly know.

[darwinbulldog]

It's an easy enough experiment to do. Just get a few hundred raw cards, randomly assign each of them to SGC or PSA, wait for them to come back, enter each of the individual grades, compare the SGC mean to the PSA mean (indepedent samples t-test), voila, you have your answer.

In practice it may reliably go in one direction for some issues and the other way for others, but I'd be interested in the main effect (i.e., who is more lenient on average).

[frankbmd]

Originally Posted by darwinbulldog

It's an easy enough experiment to do. Just get a few hundred raw cards, randomly assign each of them to SGC or PSA, wait for them to come back, enter each of the individual grades, compare the SGC mean to the PSA mean (indepedent samples t-test), voila, you have your answer.

In practice it may reliably go in one direction for some issues and the other way for others, but I'd be interested in the main effect (i.e., who is more lenient on average).

You should be able to get a federal grant to fund this experiment.

[darwinbulldog]

Originally Posted by frankbmd

You should be able to get a federal grant to fund this experiment.

Bah, I can't get federal grant money for my real research. Most of us probably already have hundreds of pre-war cards in our collections, but even if you were starting with no cards at all you could get enough together for adequate statistical power for a few thousand dollars. The average sale price of the last 25 raw pre-war cards on eBay was about $7.50.

[pokerplyr80]

Originally Posted by darwinbulldog

It's an easy enough experiment to do. Just get a few hundred raw cards, randomly assign each of them to SGC or PSA, wait for them to come back, enter each of the individual grades, compare the SGC mean to the PSA mean (indepedent samples t-test), voila, you have your answer.

In practice it may reliably go in one direction for some issues and the other way for others, but I'd be interested in the main effect (i.e., who is more lenient on average).

And even better way would be to submit that same group to one, note the grades, crack out and send to the other. Assuming none were damaged in the process you would have a definitive answer.

Finding some one to pay for and take the time to do all of this would be the tough part.

[darwinbulldog]

Originally Posted by pokerplyr80

And even better way would be to submit that same group to one, note the grades, crack out and send to the other. Assuming none were damaged in the process you would have a definitive answer.

Finding some one to pay for and take the time to do all of this would be the tough part.

I was thinking it would be better to split them because they would necessarily be in worse (true) condition the 2nd time around, but the best thing would probably be to combine the two methods, so that half of the cards are graded first by PSA, half are graded first by SGC, then all are switched.