I scanned about 50 books and keep getting a message "we are not buying this book at this time". Finally I got one, then another and finally after about 150 books I collected 20 to send. Pressed "finish" and got an error message, needed to log in again, but my cart was empty, so needed to scan them one more time. Easy to print the label, dropped off at Fed Ex. After few days got paid $8.49. So I calculated almost 3 hr to do the process. I think I will pass (>$3 per hours!). I will drop about 300 books I have to Salvation Army or Library, I have better things to do, just not worth it for me.