We don't know what property you are asking about, but you are wise to be cautious. There are scams out there that appear too good to be true. Most will want you to mail a deposit to someone in a foreign country. Others have involved local people renting out abandoned or foreclosed homes that they don't have the authority to.
Tread carefully and get some help. If it's a listed property an agent can assist you, the seller's generally pay any fee and the agent can verify the authenticity of the offer.