Model confidence
Look for model-first evidence, not just a render. The product should be exportable, slicer-friendly, and described accurately.
STL File Buying Guide
Good STL files should be more than pretty renders. They should have clear dimensions, validation notes, support expectations, sensible geometry, licensing clarity, and product images that match the real model.
What to check before buying STL files
License clarity
Know whether you can print for yourself, sell prints, remix files, or use the model in a commercial workflow.
Support risk
Understand whether supports are required and whether the model has thin, floating, or fragile details.