To estimate the price of the 2015 Hyundai Elantra I4 1.6L GL (Mid) with 216000 km mileage, I considered the selling prices of similar cars. The closest match is the 2016 Hyundai Elantra I4 1.6L with average condition and similar specs, which sold for SAR 30000, SAR 27000, and SAR 28000. Given the higher mileage of the target car, I adjusted the price downwards. Additionally, I noted the listed prices of similar 2015 models, which ranged from SAR 24000 to SAR 35000, but these are generally higher than actual selling prices. Considering the depreciation and the condition of the car, I estimated the market price accordingly.