To estimate the price of the 2015 Kia Optima I4 2.0L EX (Base) in bad condition, I first considered the selling prices of similar cars. The closest match is the 2016 Kia Optima 2.4L I4 EX (Top) with 271500 km sold for 20500 AED in average condition. Given the 2015 model is older and in bad condition, its value would be lower. The 2013 Kia Optima 2.4L I4 LX (Mid) with 268369 km sold for 13500 AED in average condition, suggesting a lower price for the 2015 model in worse condition. The 2015 model listed for 34000 AED is in better condition and not sold, indicating a higher asking price than actual value. Considering depreciation and condition, the estimated market price is adjusted downwards from these data points.