The real question is, did the ABers actually get anything during those intervals? If you were just refreshing, it likely isn't a problem. If it bought things, you might be in trouble.
It's not just getting high posts though. You need to be voted in, which I would assume means making a good impression on other users, and being a helpful member of the community.
I price my items using the pricer in the program manager. It gives a little more flexibility, and I usually go in and round out the numbers before selling as well, so it doesn't appear to be so calculated. Remember, pricing lower costs you NPs, but results in more, and faster sales. I personally prefer a quick turn around so I go quite low when selling.