I think it's a legal can of worms any way you look at it, but especially if you plan to charge for it. I think you would have to get permission from all of the

I think it's a legal can of worms any way you look at it, but especially if you plan to charge for it. I think you would have to get permission from all of the sites you plan to scrape before you sell the data to someone. It might be ok if you gave it away for free and linked back to the original source, but even then it's sketchy.