There's a guy who lives in my neighborhood that blows glass; his specialty is blowing Klein bottles (http://en.wikipedia.org/wiki/Klein_bottles). I know about him because2 or 3 days a week he shows up at my local post office right before it shuts, with a net bag that has 5-10 boxes in which he is shipping out to customers. He knows everyone at the post office by name and always gives them a big hello; he has printed and affixed the postage at his home/workshop, but brings them to the post office so he can see the tracking numbers get scanned. As there is no paperwork to fill out, and they know him, he gets handled almost immediately - typically someone will come out to scan the packages when they hear him arrive.

And since there is usually a line of people at the post office near closing time, invariably someone asks what it is that he's shipping (because it's unusual to see someone turning up with a bag of packages like Santa Claus). And he tells them what he does. Strangely, he never has any business cards on him (people always ask). So he asks them to give him their phone number instead. And they do. Now, I'm going froma small sample, but I've seen this repeat itself often enough to think of it as a schtick; at a conservative estimate, every time he drops off his packages, there's a 50% chance that he gets one new customer lead. He sells the bottles for ~$25-50 depending on the size, and marginal costs are pretty low. I'd say he's doing pretty well at his craft business, since he's shipping out a few hundred $ worth of product every time I see him, and more to the point he seems like he's having a really good time.

Obviously this sort of thing doesn't scale well, and imposes a ceiling on the amount one can earn. But as Adam Smith observed, while the division of labor may be highly efficient it's also soul-destroying. Running a one-man show like this is certainly a valid alternative to working in a shop where one is regularly called on for 'crunch time' or 'sprints' or 'hackathons'.