How do I get multiple offers on my trade-in?

Start by collecting two or three instant online offers using your VIN, mileage and an honest condition report. Then ask a couple of local dealers, including ones that sell your car's brand, for a written appraisal. Keep the trade-in negotiation separate from the price of the car you're buying so each number stays clear. Bring your best written offer to the dealer you're buying from and ask whether they can match it. Note how long each offer is valid.