PropStore, an auction house for movie props and memorabilia, is saving some of its best items for live auction, with big ones this Wednesday and Thursday; Warcraft movie props (yes, the flashback to King Llane's Battle Armor), nothing directly related to the video game, but there are some fascinating, indirectly related items for sale.

The star of the auction is Lot 19: the 11-foot Nostromo primary photography model from "Aliens." The restored model is the largest of the three Nostromo models built for Ridley Scott's film and appears in all of the close-up shots of the ship. If you enjoy gazing at this stuff, you might enjoy reading this detailed breakdown of how similar 2014's Alien Isolation is to the Nostromo's set design.

As you might expect, the Nostromo does not come cheap. The current absentee bid price is $275,000. There is also a 25% commission on the bid price, plus the cost of shipping.

But imagine putting the Nostromo on your front porch (if you can afford the Nostromo, you have a big front porch.) Tested's Norman Chan takes a good look at this model and others in the PropStore in the video below:

Other best Two of the lots were Jurassic Park's "Dinosaur Input Device" (DID), a dinosaur armature that could be posed for stop-motion animation. However, the DIDs were not filmed per se, but rather transmitted positional data to the 1993 film's groundbreaking CG model.

The T-Rex and Raptor rigs auctioned off embodied the transition between stop-motion and CG animation, and were literally built so that the stop-motion animators at Tippett Studios could work with the CG animators at ILM. (For more information, Ian Fails DID and "Jurassic Park" on VFXBlog, where he discusses the entire stop-motion-to-CG conversion)

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Even though technically they did not appear on screen like the Nostromo (although one could argue that their positional data did), such an important object of film history is going to be expensive. The starting bid for both DIDs is set at $12,500.

I don't actually collect movie memorabilia because I don't have thousands of dollars to plunk down on a dinosaur rig, but I am fascinated by prop auctions. Unlike the Nostromo and the dinosaurs, many of the props are essentially trash. They are worth thousands of dollars to collectors because Keanu Reeves wore them in John Wick. Similarly, Ben Affleck's sweaty head on the screen makes a nondescript Reebok hat (the current bid is $800) magically valuable because this reality has a more disturbing aura. Of course, these objects do nothing except require a lot of explanation when someone comes along. ("No, no, this isn't just any soap with 'Fight Club' on it, this is the 'Fight Club' soap from the movie poster!")

Props value theory aside (I would argue that there is a direct correlation between how much description a prop requires and the size of the winning bid), there are plenty of other cool things in the catalog. One of the most fun things about movie prop auctions is finding really crappy items. Here are some of the worst lots in the prop store's live auctions, in my estimation: