Do you have skills in using any of the many 3d designing software such as Blender, Fusion 360, AutoCAD, TinkerCAD, and the like? Or are you aspiring to learn?
Polymo is a marketplace that will help you to sell with minimum cost to you.
Maybe you have thought about listing on eBay or Amazon and you still can for a fee.
Selling on Polymo will allow you to:
If you are crafty or resourceful there are many opportunities to make products out of the products and services others provide here on Polymo and the rest of the internet.
For example, you could come up with your own designs, get them printed by one of the On-Demand print services, and sell them in your Polymo Store. If you work out the relationship with the 3d print artist you could do it dropship and white label.
Or another idea. You write up a project say to make an enclosure for your 3D printer and you designed the files to have Acrylic panels cut at a place like CutSendCut, and brackets 3D printed by you or someone else and hardware from McMaster-Carr. You figure out the cost for you to place this order, then add how much you want to make for each one sold and put together a listing on your Polymo Store.
You Provide instructions to build it and you sell the kit telling customers you will order all the supplies to be delivered to them. The customer receives the orders from the various vendors and your instructions and you make a profit without having to hold inventory.
And one more idea for the road. Make a project for building say, a hydroponic garden. Putting together various sensors and electronic valves to assemble a PH balancing Nutrient managing, phone app updating system that can be customized to be a single pot in the sunroom to a full outdoor farm. The sky and good weather are the limits.
Let us know in the comments if you have other ideas or ways we can improve.