Visit the textbook trade-in store on Amazon.com.
Search for items eligible for trade-in by entering the ISBN, title, author or keyword of the textbook into the section provided and press "go."
If the textbook is listed and in good condition, click the "trade-in" button next to the book to add to the shipment.
Continue these steps for each textbook you want to sell.
Review the items in the shipment.
Read and agree to the terms of the trade-in program, then click the "submit your trade-in" button.
Look for the gift card to be added to your account once the shipment is received and processed.
Visit Amazon Seller Marketplace.
Search for the title, author or ISBN number of the book you want to sell and click the "sell yours here" button when you find it.
Check your account regularly to see if an item has been purchased. Do this through the "View Your Orders" link on the "Seller Account" page.
Ship items to buyers from the "Manage Your Orders" page.
Look for funds from Amazon.com. They will deposit directly to the seller's bank account if the account information has been on file for at least 14 days.