I am not sure if this subject has discussed previously, if so I wanna repeat once again, I can't see anything wrong to remind few good things.
Some of us using this forum to sell goods or something else including currency exchange. First I want to suggest use forum escrow before deal with any
untrusted person. Sometimes peoples are avoiding use escrow in order to save escrow fees and sometimes they are getting scam. The problem is even they made the deal outside forum and they use some third party chat apps like telegram. So it would become quite complicated to prove that you was scammed. Because simply any chat history would be edited. When you will read
this Accusation then you will see accused and accuser both are blaming each other. And it's become quite complicated who is right and who is wrong.
So we could avoid such as situation if you make deal via forum PM. You don't need to chat everything, you may chat on other apps and finally before send money ask seller to send full details about product, price and btc address via your forum PM then you may send fund and reply him. So what will happen if seller scam you? You can make accusation with proper evidence, if seller deny your claim then it could be verify via forum moderators by report to admin from PM option. So if seller want to continue business here then he will have to pay back either send product. Otherwise he would marked red and you may open flag type 3.
Conclusion: Always use forum escrow before make any kind of deal on the forum. So your funds will be safe, just don't be stingy for escrow fees. And must make final deal via forum PM. Whatever you have discussed out of forum, just write final deal on forum PM, so it would help expose scammer if commit a scam.