In order to sell your car you need to ensure it is safe to drive. A safety certificate can be acquired from an Auto Mechanic.
It could be cheaper to research and conduct your own service. But any issues could null the warranty on your vehicle.
Depending on your local shop, some mechanics will sell related products for your vehicle.
Typically it will include an oil/filter change plus a general inspection. Service may also include topping up fluids in the engine.
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