Depends what's wrong with it, what age it is, how long the MOT is, etc, etc, etc.
Normally however, if you're prepared to break it you'll probably get more £, but you'll need lots of space, time, and no need for the money in a hurry.
You'll also presumably be left with a shell and bits that no-one wants, which a scrap dealer may want paying for to take away on the grounds that all the good bits have already gone - but I'm happy to be corrected on this final point by more knowledgable members.