Sites that sell demographical data for your mailing list

I remember seeing many sites long time ago that had a public pricing and offered to sell age, gender, income, address, even interests and similar for the provided emails if they could match them. I am searching again and I can’t seem to find more than 1 that I won’t link since I don't want to be flagged for spam since I am new. The one I know isn’t particularly good anyways and failed to match many emails with even basic data like age and gender. Anyone know of a larger list of sites that sell user data if provided with emails?