Portable Bluetooth + Wifi Amazon Tap Speakers with Alexa Enabled for sale ($80, retails on amazon for $130)
CS106A textbook for sale $100 (its $132 to buy used from Stanford bookstore, $177 to buy new)
CS106B textbook for rent $40 - (its $86 to rent used from Stanford bookstore)

please contact with your stanford email, will not reply otherwise