Unfortunately this is a very common scam that takes place wherever classifieds are found. You don’t need to be a member of anything to reply to email and ask for information. Generally the English is very bad and they use "rich" sounding names. It is typically called the Western Union scam. It has been going for years.
The safest way for online transactions is to use paypal and on line banking. You then have proof of payment if anything should happen. Also, paypal will back you if anything goes wrong. When in doubt, Don’t.
