I've heard some issues about this way of scamming last time and sometimes now.
Lets say your buying a blue emp. Then there is a seller selling the blue emp and you offered the amount of tokens that your buying ( example 3k tokens ) but the seller do not want the tokens. But heres the trick instead of taking the 3k tokens, the seller want another deal that sounds reasonable or you can say cheaper ( example 2k tokens + purple emp ) for the blue emp. BUT the truth is that the seller do not have the blue emp and instead the seller wants someone to buy his/her purple emp because it is hard to sell nowadays. So by using this way, the buyer of the blue emp would probably buy a purple emp and traded it + 2k tokens for the blue emp because it sounds cheaper than the 3k tokens. Do not be surprise when you pm the seller back and they are gone. The objective of this scam is that someone will pretend to sell something in order for you to buy their hard sell items to make weight into the deal. So think twice before your doing a deal with someone ~~
PS : sorry if my english is bad :3