What is the difference between Hobby and Retail editions of Yu-Gi-Oh?
There are two secret rare cards that you can pull from Yu-Gi-Oh! booster packs. For example, in Metal Raiders booster packs, the Hobby Secret Rare is the Gate Guardian (MRD-000) which is one of the hottest cards right now. The retail Secret Rare is Thousand Dragon (MRD-143) which is still a very good card, but not worth as much as the Gate Guardian. The Hobby Secret Rares are usually worth more than the Retail, and the Box/Case prices reflect that difference.