Impressive stuff! But I think 3D printer is quite expensive itself, it would be cheaper to just buy a scale model I believe, but than feats like these bring the expensive research/experiment oriented stuff into commercially viable product for average consumers.
3D printing is a truly incredible process and this video is proof of that. Check out how a company builds this entire 40% scale model of a 1927 Miller race car out of 100% 3D printed parts. This is science fiction stuff, kids! An amazing situation here. Hit the link for the video!