To estimate the price of the 2018 GMC Terrain I4 1.5L Turbocharged SLE1 (Base) with 115500 km mileage, I considered several data points. First, I looked at the selling prices of similar cars: a 2016 GMC Terrain Denali 3.6L V6 sold for 37500 AED, a 2016 GMC Terrain 3.0L V6 SLE1 sold for 29000 AED, and a 2019 GMC Terrain 1.5L i4 TC SLT1 sold for 50000 AED. The 2019 model is closer in year and engine size, but it is a higher trim. Next, I considered the accepted offer for a 2018 GMC Terrain 2.0L I4 Denali at 67000 AED, which is a higher trim and engine size. For listed prices, a 2018 GMC Terrain SLE1 with 118710 km is listed for 67900 AED, and another 2018 SLE1 with 131100 km is listed for 54000 AED. These listings are higher than actual selling prices, so I adjusted accordingly. Considering the car's average condition and mileage, I estimated the market price by averaging the relevant data points and adjusting for the base trim and condition.