Fair play to anyone who can take something and sell it. It’s no different from market traders.

The only issue I have is if people aren’t paying taxes or are doing other side hustles when they shouldn’t be.

Otherwise, it’s just smart business.

supply and demand, fair play to those who can make good money from doing it. i dont see any arm in it, the way the internet has opened up, i think its a good thing that people can make a living selling items without having to have storage and what not. provided taxes are paid, its a good way to make an income.

The practice is not illegal but is the practice ethical?

I'll stay well clear of anything like that.

I would rather buy my goods from a source I can trust.