Find great value and rewards by selling or trading-in your current ride here at Gaithersburg Mazda! Drivers in the Gaithersburg, Maryland area can calculate the value of their trade online to see if they’re interested in a vehicle trade-in offer. To get started, drivers can fill out the following form. Please let us know your up-to-date vehicle information to achieve an accurate estimate. Once we receive your submission, a dealership representative will be in touch to provide you with an estimated appraisal.