Yes, most of the guests will bring an assortment of pictures, photos, books, maybe posters and a plethora of other things to sign.  However there is always a chance they may sell out – although this hasn’t happened so far. You are free to bring along your own items to be signed – maybe your own poster, mask, photo or DVD/VHS. In general each item you want signed will be charged for, unless the guest decides to cut you a deal! Restricted items that you would like signing (e.g. a Machete) are not allowed into the convention (see rules on restricted items).