How to start selling with your 3D printer
From the first listing to real profit. A straight-talking guide to selling 3D prints without working for free: what a part really costs, how much each channel takes (your own store, Etsy, eBay, Amazon Handmade), what to list and what the file's license allows.
The e-book lives in your account area, together with the 10 free models, all already released. No card needed: the next step asks for your name and a password. Already have an account? Download it from your account.
What's inside
Your printer is a machine, not a hobby
The mindset shift when you start selling, going legit in broad strokes (sales tax, VAT, an accountant) and why to separate the money from day one.
What a part really costs
Material, energy, machine-hour, failure, finishing and packaging. The step-by-step math for a 120 g part that really costs $6.55.
Price: markup is not profit
Reference fees for your own store, Etsy, eBay and Amazon Handmade, the minimum price on each, and the $8 part that leaves 92 cents in your store and a loss on eBay.
What to sell
Pick by demand, not by taste. Niches that suit 3D printing, kits to beat fixed fees and shipping, personalization, marketplace rules and what to avoid.
Listings that sell
A title in the buyer's words, the photos you can't skip, item details, questions and a processing time your queue can handle.
Production without headaches
Print queue, machine time as your limit, quality control before packing, and packaging that arrives in one piece.
License: what you're allowed to sell
The difference between a free file with a non-commercial license and a file with a commercial license. And the STL Prime rule, in one sentence.
Your first 30 days
A week-by-week checklist: groundwork and numbers, product, listing live, measure and adjust.
Appendix: 10 models on the Bambu Lab A1
Slicer-estimated time and grams for ten of the free models, with an example machine cost for each.
The fees in the e-book are US reference values from October 2026. They change and vary by country: always check each platform's seller dashboard. The calculations are examples, with the assumptions written next to them, in US dollars.
Who it's for
It's for you if you
- have a 3D printer at home and want to make your first sales;
- already sell, but can't say how much is left per part on each channel;
- price by the filament alone and suspect something is missing;
- download files from repositories and aren't sure you can sell the part;
- want a short roadmap, with math and checklists, to follow in one month.
It's not for you if you
- are looking for an easy-money promise. The e-book is about cost, fees and work;
- want a 3D modeling course or a printer calibration course;
- need tax or legal advice. The e-book points the way and recommends a professional.
Run the numbers for your part now
The STL Prime calculator is free and uses the same formula as the e-book, in US$ or €. And everyone who creates an account gets 10 free STL files, already released. The full catalog opens on November 20, 2026.