Are you trading in your car for some new wheels? Consider these tips on how to get the most money for your used car and how to determine what’s worth fixing before you drop it off at the car dealership.

Know your vehicle’s value. Websites such as The Kelley Blue Book , NADA Guides and Edmunds allow consumers to find out their cars’ worth by entering the year, make and model. Many dealers use either Manheim or Black Book to assess a used auto’s value. With all of these available resources, a professional appraisal, which can cost between $30 and $300 is an unnecessary expense.

When calculating the cost, keep in mind any items that will increase your car’s price, like air conditioning, power windows, a stereo system, keyless entry or sunroofs. Be honest with yourself about anything that could decrease the price quote like high mileage, bad alignment, damaged upholstery, cracked windows or bad paint jobs.

Steer clear of pointless repairs. Not everything is worth a-fixin’ especially with an older, high-mileage car that may only be used for parts. On a low-mileage vehicle, any operational problems—like broken lights or warm air conditioning—should be serviced. You should mend any windshield cracks, which can easily spread, requiring a new windshield. Smaller dents can be smoothed using do-it-yourself kits.

Automotive.com recommends taking a peek at your radiator and transmission fluids, oil, belts, hoses, anterior pipes and mufflers, before you arrive at the dealership. Complications with these parts can cost less if fixed by a mechanic, as opposed to leaving it to the discount car dealer. Additionally, pre-owned cars with matching tires tend to be worth more because a complete set of wheels suggests good maintenance and little damage. If one of your tires isn’t like the others, consider making a purchase.

Wax on, wax off. Your car’s first impression will make an impact for any potential buyers. Remove all of your personal objects and double-check the glove compartment, the trunk and under the seats. Take off all bumper stickers, parking passes and magnetic ribbons. Deodorize the car if you’re a smoker. Vacuum the inside and wipe off the dashboard, and give the exterior a good wash.

Tackle the trade in. Shop around and get offers from three dealerships that sell your car brand so you have a concrete idea of how much you can gain. If you’re going to get another vehicle, buy at the same time. If you trade in and buy at once, you may only have to pay taxes on the difference between old car and new car, giving you a well-deserved break.