Cargurus is listing site and doesn't sell cars or finances them. But to answer your question, you can trade your car in to a dealer, they will give black book price or wholesale price on your current vehicle. Aka low ball you. Then hope that you owe the same or less than your current vehicle worth and the dealer will pay off the old loan and When you pick out another vehicle, you will then set up loan payments on that. Some buyers move the old debt into the new, so you are automatically underwater on your loan and will in most cases pay higher interest rate. So do some more research, find out how much your car is worth for a trade in KBB.com and how much you still owe to determine if you want to wait or not.
You buy theirs and they steal yours , sell your car your self and you'll be money ahead
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