The numbers
| Sells for | $8 to $16 |
|---|---|
| Print time | 0.5 to 1.2 h |
| Filament | 8 to 20 g |
| Cost per item | $4.02 |
| Marketplace fees | $1.59 |
| Left per sale | $6.39 |
| Per print hour | $7.52 |
| Demand (niche) | Medium |
| Competition | Medium |
| Legal and licence risk | Low |
| Evidence | Idea to test |
Estimates for one item at the middle of the price range, after filament, power, machine wear, marketplace fees and your time at $15 an hour. Shipping not included. Not sales data.
How the score adds up
Demand and legal risk come from the niche Custom shift knobs. An idea to test can score 69 at most until someone has seen it for sale.
Why it can work
- Estimated $7.52 profit per print hour
- Low brand or licence risk if the design is your own
- Seasonal demand: Christmas and Father's Day gifts, my estimate
Why it might fail
- Thin public evidence, so treat these numbers with care
Be aware before you sell
Designs on Printables and Thingiverse carry their own licences, so confirm commercial use before selling prints. Low if the design is original, but anime, brand logos and character shapes are a takedown risk. Etsy asks for your own original design, so a licensed file may not qualify.
Check your versionRun your own numbers
What Etsy shows for this
Etsy tags that match this product, with how many listings in our sample use them, their median price and views. Many listings means crowded; high views at a low price means a busy but cheap market.
| Etsy tag | Listings using it | Median price | Views / month |
|---|---|---|---|
| adapter | 6 | $40 | 567 |
| helmet adapter | 4 | $35 | 385 |
| cardo adapter | 4 | $35 | 385 |
From a sample of 3,213 Etsy listings tagged as 3D printed, exported 10 and 11 November 2026 with a third-party Etsy research tool. Medians from that sample, so estimates, not sales data. All tags