After purchasing two used engineering textbooks from this third party Amazon company, I missed the rental period because the website did not indicate in my order that it was a rental. After being on vacation while the "rental" period has ended, they have now informed me (three days after I have been charged) that I have extended the rental period, and that because I did not return the books yet I will be charged the buyout price for the books.
The buyout price is apparently twice what it would cost me to purchase the same books new. So now I am being charged $100 initially, $20 for the extension, and $310 to purchase the textbooks.
Product or Service Mentioned: Amazon Website.
Monetary Loss: $430.