Looking to flip things on the side on weekends or after work

I don't have a car so I can't get furniture and all that to home, I can get decoration items that I can get in my bag or paintings in my hand or if it fits in the bag, I can get clothes from stores that sell for cheap and sell them but I'm worried about the dye coming out.

I'm mostly going to sell via Facebook for now, but even if I get paintings for cheap and sell them for 5x or 10x at a safe meetup spot then I'll hopefully make a couple hundred every month. What else can I get that fit in my bag or I can carry around when I buy from the store and get it to home.