Is there any organization available who gives away used mobile phone for free?

Is there any organization available who gives away used mobile phone for free? I need several mobile phones as a part of a research work. I need to disassemble them and work on the circuit . In that way some of the may get damaged. So I am thinking if I could get some free... may be my question is a little weird.. :)|||The only organizations that give away phones give them to victims of domestic abuse.