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If this is your first time doing this from what I've heard you should focus on a niche that you like and become an expert on that, if you have enough thrift/consignment/facebook marketplace/offer up/etc opportunities. I'm a noob so I'm learning as I go..

You're describing my exact experience with doing this. I originally started by just focusing on video games. As that market became saturated with more and more buyers, I've branched out into other areas such as:

Small electronics
New in box items
Bags
Purses
Jeans

I'm looking to learn about Perfume next and probably some other stuff too.

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