I was wondering if there is a differents in grading companys, as far as quality in grading? Why do coins from two companys yet the same grade of coin seem to sell for two different prices?
There is plenty to read on this subject from Cointalk. My recommendation to you is NGS and PCGS for grading. Just my opinion, but I feel others will agree. They are the oldest and most trusted as far as I'm concerned.