Ecto-1 (Set 10274)
When there is something strange in the neighborhood, who yah going to call? A micro replica of set 10274, this Ecto-1 is a perfect display piece for fans of the Ghostbuster franchise, and is travel sized for your convenience! While the scaling was not exact, I estimate the build is roughly quarter scale (and half scaled compared to minifig-sized versions of the car). And with a part count of 181 parts, you won't need to dish out hundreds of dollars to have your own!
I also supplied a Stud.io file as well, so if you are interested in building your own, you can! You can buy the parts off Bricklink for around 25 bucks (US), but a lot of the pieces are relatively common, so you will likely have some in your collection already.
Ecto-1.io