Appliance knob replacement

Match and print a lost oven or washer knob

Score69Worth testingPer print hour$32.37GreatCompetitionSome sellers
Sells for $35 to $90 Idea to test

The numbers

Sells for$35 to $90
Print time1.2 to 2 h
Filament15 to 28 g
Cost per item$4.33
Marketplace fees$6.39
Left per sale$51.78
Per print hour$32.37
Demand (niche)Medium
CompetitionMedium
Legal and licence riskLow
EvidenceIdea 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

Profit per print hour30/30
Demand15/25
Low competition12/20
Low legal risk15/15
Evidence quality2/10

Demand and legal risk come from the niche Broken part CAD and print service. An idea to test can score 69 at most until someone has seen it for sale.

Why it can work

  • Estimated $32.37 profit per print hour
  • Low brand or licence risk if the design is your own

Why it might fail

  • Thin public evidence, so treat these numbers with care

Be aware before you sell

You own the CAD you create, so state in your terms who keeps the file. Copying a single part for repair is usually lower risk, but check design rights and refuse branded logos. Etsy asks for your own original design, so a licensed file may not qualify.

Check your versionRun your own numbers

Other products in this niche

69Board game piece replacement60Vintage car trim part60Reverse engineered broken part

See the whole niche: Broken part CAD and print service

Check your own idea before you print 50

Paste a link or drop your sliced file. Score, profit per print hour and legal risk in a minute. 3 checks a month are free.

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