I am also very new to BP's, but had other snakes and reptiles over the years. I would not get a known problem feeder.
I have had a good few problem eater baby corn's over the years, and the stress on the snake and the owner makes it not worth it to knowingly put yourself through it.
Of course if you get one and it becomes a problem eater then you do everything you can, but I think if you can avoid it, then avoid it.