As our National Treasures series continues- conspiracy theorists will love this one as it is Episode 777… and lucky guest number 13!!! If there is someone you want to hear from about the world of grading- it’s Derek! We have the behind the scenes about the Mantle SGC 9.5 and a great conversation about the subjectivity of grading. This one is a marathon- and worth it! Enjoy and thanks for listening!