While it may be possible to make tools at home if you have the facilities, for someone to make a living, or even supplement one, by making these tools, it does not hapen for free. You and I don't charge for our labour when we make our own tools. If you are making tools for a living then you should be charging for your time and materials, advertising, marketing and overhead costs.

Just compare what you would pay a plumber, electrician, carpenter or refrigeration mechanic for their time - Usually a $100 call out fee plus $150 per hour after the first 15 minutes on site (if you can get one to come out, that is)

Then compare the markups on most items sold in shops these days. 300% is not an abnormal markup in speciality stores and 100% is not unusual in food stores, frequently more in the small delicatessen stores, if they can get away with it.

Just because you can make a tool for under $20 does not mean that that is all the tool is worth to anyone else, just to you.

I hope this puts a different perspective on the issues of people selling things for profit.

Regards,
Tony