To estimate the price of the 2015 GMC Acadia 3.6L V6 SLT1 in bad condition, I considered several data points. First, I looked at the selling prices of similar cars: a 2017 GMC Acadia SLE2 sold for 53000 AED and a 2016 GMC Acadia Denali sold for 54000 AED. Both were in average condition and had lower mileage. Given the target car's bad condition, I adjusted the price downwards. Next, I considered an offer accepted for a 2015 GMC Acadia SLE2 with 109000 km at 27000 AED. This car had better mileage and condition, so I adjusted the price further down. Lastly, I reviewed listed prices: a 2014 Acadia SLT2 listed for 27500 AED and a 2015 Acadia SLE2 listed for 27000 AED. Both had similar or higher mileage but were in better condition. Considering all these factors, I estimated the market price accordingly.