The old Star Frontiers game had two boxes of starship minis and three or four boxes of character minis. In addition, they sold individual starships in blister packs. They are still regularly available on Ebay.
The starships aren't great, but they do make combat easier if you have nothing else.
Be aware that these boxed sets (especially those that are 'still in the shrinkwrap') are about 20 years old. I bought a character mini boxed set about six months ago, and even though it was still in the shrink, the minis had serious corrosion. I didn't have that problem with the starships boxed sets, but the starship minis had been primed.