Paypal is pretty useful but I have heard that it is not a good idea to ship stuff out of the country if you have been payed with it because the buyer can claim he never received his stuff and get a full refund from your credit card.
I have done some what to me are big transactions (500 to 600$)over the CGN (canadian gun nutz) exchange with no problems at all. It is a small community ,everyone knows each other and most of the people I have dealt with have done 100's of transactions. EMT is the preferred method of payment and it is mine as well unless I want the extra protection of PP. With EMT the fees are minimal(1.50$ for everything I have sent)it is instant ,it comes out of your bank account but it is the totally safe as the people sending or recieving the cash don't need to know anything but a screen name and an Email address + an agreed upon code. When you see some funds transfer in a movie like mission impossible 3 with the 2 laptops this is how it is done.
If you stick with people from BF ect who have good reps you won't have any problems.