Scenario
Victim : (roaming in the town)
Scammer : Trading my Leprechaun to a Level 30 Northern Staff of Brutality!!! Trade me fast!!!
Victim : Oah! theres someone selling that staff on the CS
Scammer : I know, but I dont have golds here. But if you buy it for me, I'll trade my lepre for that.
Victim : Sure, wait here I'll buy it.

[On CS the Northern Staff of Brutality was over priced to 120k and only one seller]

Victim : (talking to himself) Its 120k but the lepre is around 200k, so if I sell the lepre after trading I will earn 80K! wow!

[Bought the staff at the CS for 120k]

Victim : Hey I bought the staff lets trade!
Scammer : Sorry but someone already traded with me. Sorry.
Victim : What! What would I do on this over priced staff?
Scammer : Really sorry bro. (with an evil grin on his lips!)

[What is the scam there?]

The seller of the over-priced staff was actually the other account of the scammer!
He sold his staff in over price on his other character while keeping the leprechaun pendant!

YOU HAVE BEEN WARNED!