Up first, from Star Trek II: The Wrath of Khan, it's the "damaged rollbar" model part from the USS Reliant:
Here's something super-cool – a "First Contact" Spacesuit later used in Voyager by Chakotay. Check out all the great detail:
To go along with that spacesuit, how about a hero EVA rifle complete with lights from "First Contact"?
From Star Trek III: The Search For Spock, here's an amazingly detailed prototype of the enormous Spacedock facility. The model is almost 18 inches tall and comes complete with a custom-built stand.
And wrapping things up, from "Enterprise", here's T'Pol's Vulcan uniform in all its form-fitting glory:
That's it for me but you can check out all the details on these and other great pieces from Star Trek (and other properties) by clicking here: PROPSTORE.
Good luck at the auction!