I think the $20K machines by Object print at 16 microns so check picts there.
- for 3d models, Google's sketchup ( they bought out sketchup a few years ago) warehouse has lots of models though many are for architectural purposes.
- they supposedly have new techniques that will increase the speed of print by orders of magnitude but it's still in the labs. ( eg. Vienna university researchers)...
to be profitable with a home 3d printer, doing a diy cone skimmer or something like a mame part will get you the best bang for the buck as opposed to something like a chess piece. Let's hope the plastic is reef safe.
msjboy