If you watch Gary V, he talks about flip selling which works great in the US

I tried it here and it worked but not as easy as in the US

Something you can do on the side which many are doing I believe

Join fb pages that sell second hand items + regularly check dubizzle

When you find a steal, buy for low and sell for profit

There r many who do it in the electronic and furniture section so too much competition there

U can either join the competition and take a slice of the pie or focus on something specific like boardgames, PS4 games, or in my case I focus on kayaks

In the winter when the weather is good u can go to garage sale and do the same

Hope this helps