1. My miniatures are designed in 1/400 scale and can't scale any smaller. They can only be printed in "smooth/est detail" plastic unless it is 1/100 and larger which can print in versatile plastic.
2. 6mm is the common wargaming term for 1/285 scale. Z scale is 1/220, N scale is 1/160, HO scale is 1/87
3. Moving parts don't work easily because the wax support can't escape the joints. After 2 to 20 hours in a Simple Green/50 watt ultrasonic bath some parts will move. At these small scales the wax is stronger than the <1mm plastic pivots. So consider all models static with only a tiny chance to have moving parts unless noted otherwise.
4. Shapeways doesn't tell me about their pricing formulas but here are some estimates from my products.
1/200= 8x more material than 1/400, ~3x to 6x the price of 1/400
1/160= 15x more material than 1/400, ~4x to 11x the price of 1/400
1/87= 97x more material than 1/400, ~5x to 10x the price of 1/400
It seems Shapeways actually costs less the bigger you go since you are getting much more material for less money.
5. The "versatile" plastic looks like sandstone and is impossible to paint smooth.
Buying finished models: You can search for designer usernames regarding painted photos. Maybe they will sell you their models. Select "designers" in the left dropdown box of the "all products" searchbar.
I am quite busy doing real work, this place is just a hobby=loss of money. You can see some of my portfolio at facebook/ttakata73 (I don't use FB's messenger).
Most of the recent models have taken me 10+ hours to design. I charge $50 per hour for design work so unless you are very enthusiastic or rich, please don't waste my time. I also avoid tracked vehicles because it takes too long to make sagging tracks.
Example 1: GPUFT99 is a simple model that took 2 hours to design since its simple extrusions and orthographic drawing/dimensions exist online.
Example 2: LSR1931 Blubird4 is a simple model that took 8 hours to design since no good drawings exist.
Example3: TaxibotWB is a medium model that took 20 hours to design since no drawings or dimensions are publicly shared.
Example 4: Even with drawings; the Lieb LTM1750 is very complex with multiple parts and took 40+ hours to design.
Please message any orthographic drawings if you want a quote. Any basic design needs to have a straight on front, side, and top views. If the bottom and back are different then those drawings must exist too. I essentially need to know what an object looks like flat from all sides so if you don't have this info I can't make it without a lot of guessing. You can find great videos online about "orthographic drawing" to explain how to design on paper. I don't do sculpted forms like modern cars, wings, animals, etc....because no info exists for body contours so they would be impossible for me to duplicate.