I think if there's a demand for the items she's reselling and she's adding value and supporting her family then it's a great thing! There are people who buy, fix and resell all kinds of items ranging from small appliances to cars to houses.

I'm getting in the business of buying, repairing and selling used cars as a way to make extra money (on top of my corporate job that I hope to leave at some point before I completely lose my mind). It's a good fit for me as I'm an engineer and my business partner is a mechanic who can do anything from engine / mechanical repair to body work and paint. It's been slow going at first because we both work at least 40 hrs per week at our regular jobs (if not 50 or more) but we do what we can with the time we have available.

I have a lot of respect for people who find non-traditional ways to earn a living because that's what I aspire to do someday (and hopefully have more time at home to spend with my family).