As an owner of THG Heat, I would love to offer a less expensive, flat jawed, leveraged crimper. I'm not aware of a $20 version, I would love to be enlightened. You can't just use "any crimper". It needs to be leveraged, to get a powerful crimp, as well as parallel flat jawed.
We had to order a ton of these to get even a $60 retail price, and even then the margin is very slim.