There is, but it will be a very very slow start to grow. Most document destruction companies handle this already, and there are are many of them out there (https://directory.isigmaonline.org/). The E-waste removal is usually provided for free because they are paying for the document/data destruction services.

If you think potential customers are searching Google for your products, then I would suggest google AdWords also.

Do you have Analytics setup on your website, to see where your customers are coming from and what they were searching for?

You don’t buy legit reviews, those are called illegitmate reviews