Seller: nevrgonastopme00 (190) 100%, Location: Vancouver, Washington, Ships to: US, Item: 273645944057 Get your piece of DEF CON history! DEF CON 25th anniversary registration pack, CDs and booklet. Great for the hacker in your life, or for completing your own collection. Condition: Used, Condition: CD is unused, still in original sleeve. Booklet has some edge wear from travel, but otherwise pristine.