With the caveat that these sculpts are not final (and, of course, the finals will be pre-painted), these official Starfinder miniatures from Ninja Division will be sold in a single, or two sets, with the price as yet undetermined. Characters and monsters have round bases, while starships have hexagonal bases. Even if you don't want to play Starfinder, these look like a great resource for any sci-fi game in the way that WotC's pre-painted plastic Star Wars minis were.
First off, the Envoy, Mechanic, Drone, and Solarion.
And here we have a selection of starships.
First off, the Envoy, Mechanic, Drone, and Solarion.
And here we have a selection of starships.