@Janarthan and @RohanH you will end up paying more money with dubizzle which you can get it done from an ordinary mechanic.All the running costs of a bigger franchise are included in what is being charged to you.
Considering that you are buying a pretty old car without worrying much about the interiors /paint/ luxury inside, every penny saved is worth it. You can as well use the same money saved to get it thoroughly serviced / for parts.
You need a good advise regarding the mechanicals which any other garage/mechanic will do for a much cheaper price. Some garage even deduct that money if you get the car serviced from them once you buy it.
Personally once you start inspecting the cars on your own, you will also learn a lot if new things which will make you have a better knowledge to do some things in future on your own.
If you are worried about the current covid precautions and not willing to take risk ,then yes you can go ahead with dubizzle assisted buying or report as there is someone else doing it for you. But if you adhere to proper precautions, then it is still possible to do it yourself
Good luck and stay safe