If you buy a book from these scam artists, you will automatically be enrolled in a membership to buy from them which starts at $9.95/mo.
It may be unnoticed on your credit card, so check it every month and if a charge from BBV DISCOUNTBOOKSALE appears, you will know you've been taken to the cleaners and they are stealing from you
Call your credit card company and dispute the charges, and make BBV DISCOUNTBOOKSALE disenroll you from their "club"