not sure what u would call this but its a good money making technique.
First u need 2 ppl or 2 accounts for this to work. u set up a trader mode selling something for like 50,00adena then u have the second person set up a store buying something for 40,00 adena..then when someone buys the 50k item and goes to sell it to the 40k person the 40k person stands up and stops trading...the person that bought them got stuck with the item and u sold ur item really fast

hope this helps and is not to confusing