To estimate the price of the 2016 Hyundai Elantra I4 1.6L Smart (Base) in bad condition with 288700 km mileage, I primarily considered the selling prices of similar cars. The closest match is a 2016 Hyundai Elantra I4 1.6L Smart (Base) with 297000 km sold for 28000 SAR on 2024-01-08. Another similar car with 344500 km sold for 23500 SAR on 2023-09-10. Given the bad condition of the target car, I adjusted the price downwards. Other similar cars in average condition sold for around 27000-30000 SAR, but they had significantly lower mileage. Considering the high mileage and bad condition, I estimated the price to be lower than these figures.