The Message Madam trade process is powered by Kelly Blue Book, the most trusted car value source in the world. Our trade values are competitive and you do not have to purchase a new vehicle to take advantage of our Kelly Blue Book executive trade program. The Kelly Blue Book/Madam trade process is simple. Answer a few questions about your trade and we will reply in minutes with your trade value. At that time you can choose whether or not you'd like to subtract it from your new purchase.