Later this month, an exemplary collection of screen-used film props, costumes, castings, and behind-the-scenes Hollywood memorabilia goes up for auction in London. I asked Brandon Alinger, one of the collectibles experts at Prop Store, which is running the auction, where all these goodies come from. “This is what we call our ‘multi-consignor’ sale,” Alinger said in an email. “The pieces have been sourced from a variety of different places, including private collectors, studios and production companies, industry personnel, and rental houses.” Alinger also says his team has thoroughly researched and authenticated each item—600 in total—so these gems are legit.

The live auction is on September 26 in London, but you can bid over the phone or online. You can see many of the props in person as well at London’s Odeon BFI IMAX. Take a look at some choice pieces from classic sci-fi, fantasy, and action movies below. Pricing in the catalog is in British pounds, but we’ve converted them to good ol’ American greenbacks here. A warning: prop collecting is a rich-people business, and the size of these numbers will make your eyes water.