Going to garage sales and finding worthwhile items that people want and selling it online. Now is doing pretty much the same thing with information. Smart and hard-working 25 year old.
I have been doing that since i retired also trash pick for furniture and i have a few supply houses that trash new stuff all the time
I did that for awhile it was like a treasure hunt every weekend. People toss out more real gold jewelry thinking it is costume then you can believe. They must have bad eyes or lazy.
My brother lived in LA for several decades. I walked him into a warehouse crammed full of used furniture in our hometown. He said “If I could lift this place up and dump it into SoCal, I would never have to work again”. He got more depressed when I told him there was another one across town. Two former manufacturing plants full of OPS (Old People’s Stuff).