Disney only has one big pin event each year. This event is usually held in September, but has been held in August at least once before and one year was held in June. The event usually averages about 1200 traders. You will need to complete your RSP (Random Selection Process) with the pins in the order that you want them most. It makes sense to put any pins that you really want or pins that have a very low edition size as number one or number two on your RSP. There are some pins that are popular characters and low edition sizes and if you do not put the pins in the first slot or two, you will not be awarded those pins in the RSP. There are some traders who will wait in lines for the pin boards all day and some pin traders who will sit in the back area and trade. I guarantee you that you have the best odds of someone in that room having any pin that you are looking for during this event. It is a lot of fun!!