find the cheapest poles you can, and if you dont ski like a retard, you wont bend them, i have a pair of LOOK poles from like 1987 that i got at a ski swap for like 3 bucks, and that was 4 years ago, i traded grips with my dad, but no other problems with them, and they arent bent
there is no good reason to buy carbon fiber poles unless you race or really thing that the weight matters that much.
i know kids that ski under lifts just to pick up rental poles and use those