Miniatures for use in roleplaying don't need to be beautifully polished and detailed. It's nice if they are, but there's nothing stopping you using any old lump of plastic, or spare dice, or even cheese-flavoured snacks to represent various characters or machines on the tabletop.
In fact, you don't need miniatures at all. You don't need to spend time scouring hobby shops for model kits, modifying character figures to customise them with the right gear, or bashing together disparate parts form multiple sources to produce that perfect model. You can just get by imagining the layout of combat scenes in your head. But where's the fun in that?
Transcript
Leia: Come on, go go go! Your launch window closes in four minutes!
Leia: R2, have you finished your calculations?
GM: No, he's still going.
Leia: No choice. He'll have to finish them on the fly!
Leia: Luke: Get him on your X-wing!
Luke: My what?
Leia: I just thought... the miniature looks like an X.
Leia: Made of wings.
R2-D2: {aside} Or it used to be a wing.
GM: Sorry, it's not the best glue job in the world.
R2-D2: Giant space battle, here we come! Finally!
GM: Actually... it's a bit late. And I might need a few more models. Let's break until next week.
R2-D2: Nooooooooo!!!!!