This is cool. The title had me thinking about just repairing old clothing. It generally takes $4-6 at a tailor to fix a pair of pants, etc. I've gotten years more out of my jeans just doing that.
I think just shortening a pair of pants is 30$ minimum.
Things that can't be done in a factory are increasingly expensive, especially if you don't have underpaid workers.
"A Computer's Perspective on Moore's Law: Humans are getting more expensive at an exponential rate."
https://web.archive.org/web/20070203034530/http://www.caplet...
What if there's only 20 pants to be fixed on a slow day..
If you send it off, you have logistics and both the tailor and the sales person need to turn a profit.
It's one of those things that is really not hard, you just have to have some exposure to it.