it depends how vital the organ is, how old I am, if I have had any issues with said organ(s), and still probably no, since generally the implants are much more successful if the people are somewhat related (familty/etc.)
ex: I wouldn't do it if it was a kidney and I had kidney problems, since I would need both of them, but if I was old and had heart problems but no kidney problems, I might do it
or were you talking about after you die/etc.?
and even so, probably not a complete stranger, I would like to know some information about them first if possible (not really sure why too much, just curiosity?)