Watched these the other day. Hope I'm not doing anything wrong posting these here ... I found these all very interesting as a newbie to numis, and PCGS grading / slabbing. Coin Grading 101: Introduction to Coin Grading [youtube]http://www.youtube.com/watch?v=Apn-kYEl-Xw[/youtube] Coin Grading 102: Qualifiers, Proof Coins, Modern & Difficult to Grade Coins [youtube]http://www.youtube.com/watch?v=DTcdbqhhsSs[/youtube] Coin Grading 103, Part 2: Counterfeit Detection [youtube]http://www.youtube.com/watch?v=M75GZeKZb38[/youtube]