Beware of prices that are too high or too low. To compare prices, use the Price estimator arabcamions.com
Favour contacts by phone. Check that the phone number indicator matches the country of the seller. Try and avoid numbers starting with 08, this is a surchaged number.
Even though the ad details the technical characteristics of the vehicle, don't hesitate to ask the seller what were the conditions of use of the vehicle.
Systematically refuse to be paid with a cheque and favour bank drafts. Always check the validity of the bank draft: find the contact details of the agency that issued it and contact them to be sure of the authenticity of the bank draft.
Try and avoid bank transfer, such as Western Union. As a general rule, don't accept any non-secure transactions.