The numbers
| Sells for | $14 to $24 |
|---|---|
| Print time | 2 to 3 h |
| Filament | 40 to 70 g |
| Cost per item | $5.25 |
| Marketplace fees | $2.26 |
| Left per sale | $11.49 |
| Per print hour | $4.60 |
| Demand (niche) | Medium |
| Competition | Medium |
| Legal and licence risk | Medium |
| 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 Card reader and POS stands. An idea to test can score 69 at most until someone has seen it for sale.
Why it can work
- Seasonal demand: Spring to December craft market season, based on my judgement.
Why it might fail
- Square is a trademark, so use 'fits Square Reader' wording and only add a logo the customer owns
- Thin public evidence, so treat these numbers with care
Be aware before you sell
At least one MakerWorld stand forbids selling printed versions, so design your own or confirm the licence. Square is a trademark, so use 'fits Square Reader' wording and only add a logo the customer owns. 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 |
|---|---|---|---|
| phone holder | 5 | $37 | 850 |
| phone mount | 5 | $40 | 850 |
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