Please: don't bid, if you don't know, what BlueKai data is (hoping that I'll tell you, and then you "scrape" it from somewhere; no, you won't).
Only bid, if you can offer BlueKai data (sample required) - and if so, tell me expected price.
Dear Hiring Manager,
I have related sort of expertise and can deliver the best. I will ensure the highest standard to satisfy you. And will share the ideas with you.
Let us discuss about the project.