I would have gladly drop a few grand to acquire that skill. In fact, I'm considering hiring a speaking coach to improve.
I've historically been a strong written communicator, but it turns out that speaking is very different from writing. In fact, I had thought of myself as a pretty strong speaker due to my experience giving scholarly presentations ... how wrong I was. Academic talks are a different beast altogether.
If you haven't seen Patrick Winston's How to Speak lecture [0], drop what you're doing and watch it now. I'll leave you with a (paraphrased) quote from his lecture: your ideas are like your children and you don't want to send them off into the world dressed in rags.