At first you can buy cheap props, there are many cheap props. If you have already the cheap props, you have a good little collection and then you have three categories, your toy story collection your back to the future collection and a small collection of other movie props.
And later you can buy something expensive props like the jumanji board.
There are many good cheap props even from cult movies, Examples: Christmas Vacation Single Glass Moose Mug, Jurassic Park: Brochure & Claw, Batman:Two Face Coin, The Goonies- Copper Bones, The Hunger Games Movie Mockingjay Pin, The Mask: Mask, The Mummy: KEY TO HAMUNAPTRA, Jason Mask, Green Lantern Ring, Superman Crystal, MOS Superman Key, Inception Totem Set, Super 8 Argus Cube, Iron Man Arc Reactor, Wolverine Dog Tag, Freedy Glove. :thumbsup