Can you suggest some precautions for beginners to avoid getting scammed ?
One every sure way to stay out of scam is not to get greedy by either willing to sell at a deal too good to be real or willing to make instant money within few number of days. It won't work. Another way is to not to be too rash in taking a decision, take your time and re-think over it again and again before going for it and the moment you have doubt about anything, just listen to hour guts and go over it till you are sure. Its better to be safe than being sorry.