Do you think it is a good idea to buy one? If you're going to hold onto it for a long time, then yes. If you're hoping for quick money, it's not too great, unless you're merchanting. Does this usually happen? Yes it's happened before. People try to predict how prices will be before, during and after Halloween and all these predictions affect how it turns out because everyone sells or keeps onto, etc. What do you think they will rise to? Hard to say. I don't see any major price changes unless new rares are introduced or something drastic happens to the economy. They probably will return to normal price after a week or two.