1. To stop all scams no links or emails are allowed in For sale in Dubai forums. Use your local Dubai phone number as contact info. If you are not located in Dubai this is not the place to advertise your services or products.
2. If you don't want to disclose your mobile phone ask users to contact you through private messages. Then agree to a meeting.
3. When buying something through Dubai Forums never pay upfront or through Western Union.
First meet with the buyer in a public place, examine the thing you are buying and only then decide to buy it or not.