I own 2 original screen/production used props straight from the set of Rob Zombie’s Halloween 2, I have Harley David’s (Angela Trimbur’s) black party wig from the Halloween party scene, and I also own Mya Rockwell’s (Brea Grant’s) license plate. They are both in fantastic screen used condition and both have certificates of authenticity. I was just wondering if maybe anyone could give me a rough idea of how much these items are worth,and maybe where the best place would be to sell them? (If i wish to in the near future) Thanks guys, I will upload photos of them when i get a chance!! 
Peace.
I would say somewhere between $75-$150 for each item is fair. Your best shot is selling them on a fan site or facebook.