is it morally ok to sell stuff that you got for free of Marketplace ?

[LidiaM]

I wonder what people think about making money by getting stuff for free of gumtree or Marketplace then selling them instead for money ?
am I wrong to think its wrong ?
lets put that right - Im not talking about the stuff you get from family or friends, just strangers that give free stuff on websites because of their lack of selling or they cant be bother to or maybe because they dont care about a tenner or 2.

If I give something away on fb, I don't then follow the life of that object. How would you even know?

I just want it out of my house, I dgaf if the person sells it on after that.

It's legally fine but morally a bit dubious I think. People often give away items on sites like gumtree or free cycle because they want to help someone out or see an item go to someone who really needs it. Praying on that goodwill to make a quick buck is a bit cheeky.