I do that all the time. A thing is a thing, and it can be your thing now. I only try to ask myself two things:

1. Do I really need that?
2. Is it in a good condition? I have a lot of used stuff at home, so if I took something half-broken, it would look like a dumpster already.
   Sidenote: I live in Denmark, where people overconsume, and then get rid of stuff which is still in good condition.