My older sister uses Chegg all the time. It is well known as one of the most reliable textbook rental services. I looked up the book and while you can rent it for $70, you can also get it as an ebook for a little over $20.
Here’s the link: https://www.chegg.com/search/%22Everything%E2%80%99s%20An%20Argument%22%207th%20edition/federated?trackid=7224bdeb&strackid=1df92290&event=enter_submit#p=1