Morning! The GT3 RS is definitely a sought-after car, so finding the right one takes patience. I was hunting for one myself earlier this year and found exactly what I was looking for at Zeus Motors
https://auto.ae/zeusmotors in Al Quoz. They actually had a 2016 Porsche 911 GT3 RS 991 with only 9,025 kilometers on it — incredibly low mileage for a car of that age. The price was 599,000 AED which, considering the condition and rarity, was quite fair for the Dubai market. What I appreciated about them is that they understand enthusiast cars and take care of them properly. The vehicle was immaculate, clearly garage-kept, and all service records were available. They're open from 9 AM to 9 PM daily, so easy to schedule a viewing. If you're looking for rare performance cars, they're worth checking out — their inventory is constantly changing with interesting vehicles.