[KeithBrink]

Like some others here, I have an Amazon FBA business but I treat it as my full-time job, even though I've automated a lot of the grunt work and employ a VA for the things that can't be automated.

I did, however, find a little unsolved problem on Amazon that sucks up seller's time, so I built a solution[0] for it with about a month of work, and now it generates >$2k/m with 1-2 hours of customer support work every month.

[0] https://azlabels.com

[prokes]

Your label product is the best answer on this thread and ironically there are no comments. Knowing an industry, finding a need and building it is the ultimate passive income business. Don't know much about your market but I think you could increase prices to $0 / $20 / $75 per month.