Only meet in public places. Make sure the place where you are meeting is familiar to both you and the buyer/seller.
Have someone accompany you as a witness to the transaction & avoid going alone.
Upon meeting the buyer/seller face to face make sure you FIRST verify the identity via the Sultan Qaboos Souk Profile QR code. The documents shown in the profile should match the person you are meeting. This way there will be less chances of someone scamming you.
Do not make any advance payment or money transfers before carefully inspecting the product and matching details of the product on Sultan Qaboos Souk.
Carefully and calmly inspect the product before you finally decide to purchase it.