By "here", do you mean trade at bitcointalk forum? If you actually meant bitcointalk forum, then yeah, you will need to be really safe cautious. As soon as you make a post, there will be people jumping in to try and scam you. Best way is to look for a reputed trader on the forum. Look at his trust rating before initiating any kind of trade. If you don't find any kind of well known traders, then before trading with a unknown trader, it is recommended to use a middleman/escrow service.