Click into each product to see each scale/price; smaller scales usually have multiple pieces. You need to pick the scale first; then the material, then double check dimensions at the lower right side of the screen. I am not an employee so can't do anything but make models, add scales and materials. Anything related to orders/shipping/customer service must be asked of Shapeways. Every vehicle is designed in 1/400 and cannot scale any smaller, or be hollow, and can't have open windows. Versatile plastic only works for 1/100 and larger. Nothing will print in metal. It takes 10-30 hours to do a good vehicle so consider yourself lucky I don't charge $$$ per model; so I don't offer combo sets. My painted models are usually 1/400 so don't look nice; you can do a better job and larger scales will be easier to add details. Please resell painted models and message me pictures. If they look nice I will add them to the product pages with your username. You can only use "sort by" when looking at "All items"; categories cannot be sorted. I will ignore all messsages about selling my CAD designs unless you paste in the text needed at the bottom of the page.