Sometimes, the front teeth will butt. If the teeth are wearing normally (meaning you don't see any overgrown or long teeth), then I would judge those teeth as acceptable for a pet rabbit. Butting teeth is a showing disqualification, if you are willing to accept a rabbit with non-problematic butting teeth, you may have a very good chance to adopt a gorgeous [otherwise] show-quality rabbit.
Sometimes rabbits teeth will butt or overlap the wrong way and not wear normally. In this case, the teeth can and should be clipped. It only takes a couple of seconds and is fairly easy to learn how to do; your vet or a local breeder can teach you. My vet charges less to clip a rabbit's teeth than to clip a dog's nails. The frequency of the clipping will vary with the severity of the malocclusion. If the teeth need clipping but are neglected and not clipped, the rabbit could lose his ability to eat and starve to death. Wolf teeth are misaligned teeth that grow in all different directions. Simple clipping may not be enough to all rabbits with this problem for them to live a normal life. In many cases, rabbits with severe teeth problems can require euthanasia.
Checking the teeth is only one part of the pre-adoption evaluation you should perform before you decide to adopt a pet rabbit.