Caveat Emptor

To the best of my knowledge www.careerbuilders.com and www.monster.com are legitmate on-line businesses but they are being used by illegitmate companies, people, dirt balls, whatever. Since placing my resume on both of these sites recently I have been receiving e-mails with offers "to good to be true" and you know, or should know, that if anything seems too good to be true that it probably is. The questionable e-mail replies to my resume have simply been the notorious phishing scams which are numerous on the Internet now. Now I am worried about a job offer I replied to at www.craislist.org recently. Could that one be a scam or phishing expedition as well?