Ask HN: Facebook Ads price charts?

Quite a few people have done some experiments on HN data, slicing and dicing it one way or another, trying to predict what's the good time to post and what is not and alike.

Are you aware of any mash-ups that do similar things with Facebook Ads price? I started experimenting with ads placements to drive some highly-targeted traffic to one of my online experiments, but find it quite confusing to see the bid price changing underneath me.

It'd be good to get at least rough idea what dynamics are like for my market segment - i.e. when are the peak and through times.

So, do you guys know of any tools like that, or should I just whip together a quick and dirty python/Selenium script that does the scraping?

Thanks!