The Millenium Falcon
The Millenium Falcon on Tatooine by Ralph McQuarrie
George Lucas's initial sketches of the "pirate ship" and other Star Wars vehicles
$25,000 initial model cost (1/3 of their entire model budget) 400 cycles of electronic wiring inside
Ralph McQuarrie concept featuring the original pirate ship
Buckets turned on their sides replaced the B-52 cockpit. They're also reminiscent of the escape pods that sit on the sides of the final Falcon.
Bonus Greeblies
Colin Cantwell with some of his original designs, and his ships eventual inclusion in Andor