not sure if this has been posted before, couldnt find anything same about it... oh well!
Okay, this scam has to do with proffesions, this only works for the ppl who have crafting proffesions, (tailoring, blacksmith, leatherworking)
Okay, so you can start off by saying in trade channel that "Crafting [something] bring mats blah blah..."
if its a good item which every1 likes/needs you can get a couple of whispers, i personally did it with riding crop...
When you get a whisp 90% of the ppl ask what are the mats, now... heres the scam part! Take the most expensive item in of the mats and take that x2 or something, (you need 1 primal might for riding crop, i told a guy that you need 3 and he fell for it)
So when the guy gives you the mats, you just do the thing for him and keep the rest of the mats, i did this for a while and got myself some primal mights and arcane dusts ^^
The only way you can get caught is if the guy asks a friend or something and notices that he gave you extra mats, but i doubt it will happen
Thank you for reading! Happy scamming