I don't trade, my main reasons:
1. Everytime you will most likely be scammed.
2. Go to 'advertise' something and this happens to you '\__/ Scammer!'
3. Drop first, bye bye your gone.
4. Do a fair trade others will say your a scammer.
So my advice if you really want to trade, dont trade with strangers, try trade with people you know a bit better.
Because i can tell you now, trade with strangers you will be scammed.