Well, if you think about it - there's a lot of stress on the front tower strut as that part of the chassis was always meant to flex. Even if they didn't whack, it will still be under a lot of stress.
Oh you meant the ARB? If ARB that's a different story. ARBs don't take all the stress, it's spread out to the links and your chassis. Those can buy second hand no problems. It's the tower struts that shouldn't be bought second hand. Btw, it wasn't 'badly' bent or twisted, it was just twisted slightly and that was enough to not fit properly and the worst thing is you can't physically see the problem until you try installing it.
---------- Post added at 08:02 AM ---------- 6 hour anti-bump limit - Previous post was at 08:00 AM ----------
Btw, this is a front tower strut bar :
http://thumbs3.ebaystatic.com/d/l225/m/mg6chG38SPPkIbq7JPP5W6Q.jpg