Posted By:
Mark Tsince your only motivation is $ then my opinion would be PSA. I say this because GAI/SGC don't have the same Registry following (in my opinion). Most collectors who use the registry are trying to complete it and get the best grades. PSA seems to be popular.
I have heard GAI is trying to do a better job at grading but the fact remains that once you see a GAI holder you don't know if its been graded last week or a few years ago.
But, it will depend on the cards you are having graded. If they are caramels and in nice shape then SGC or PSA are the way to go. Of course you will have to spend $100 for PSA membership and get 6 free vouchers. You get their POP report and SMR so everyone is different. My opinion would be pay PSA the $ for membership and have them grade your cards.
Remember: this is only my opinion and you will get many more.