If you are looking to set up at your first show you should contact the promoter. Most if not all flyers/FB posts/etc. will have the promoters contact information, just call and ask how much for a spot. As far as pricing goes, I always used ebay/auction houses as a barometer of FMV. Remember that having accurate pricing and grading is the key to return customers, a good display with desired items is the way to get people to stop. People will ALWAYS want to negotiate, do not be rude when someone tries to lowball you (they will) simply realize that for every 15 times they ask, 1 person will say "Sure". Hope this helps you, and good luck.