GCC-spec cars are built for this climate: uprated radiators and condensers, dust-rated filtration, and manufacturer warranties that are valid at local agents. Imports, mostly from North America, Japan and Korea, are a large and legitimate part of the UAE market and are often thousands of dirhams cheaper, but the discount exists for reasons an inspection should quantify. The first step is simple verification: the VIN plate, the door-jamb build sticker and the chassis stamping should agree with each other and with the registration card, and the sticker itself tells you the intended market.
For American imports, the history check is the inspection before the inspection. A VIN lookup against US auction and insurance databases will surface salvage titles, flood branding from hurricane seasons, and odometer discrepancies before anyone crawls under the car. Japanese imports come with auction grade sheets; ask for the sheet and have someone verify the grade and the recorded mileage rather than taking the windscreen sticker's word for it. On any import, mileage should be cross-checked between the cluster, service stickers, and where possible the ECU, because odometer adjustment remains a real problem in the re-export trade.