The main problem with this type of system is the current economic structure of ARR. This game has one of the worst economic structor I have ever seen in a MMO. Items massively deflate in a matter of moments due to over supply. SE was told since Alpha-1 this type of system would destroy this games economy. Instead you get all these white knights say "its a good system" having clearly never playing other MMO's to compare it to. What this system does is called a economical implosion. The games economy isn't growing, its implodeing. SE quick fix is to dump thousands of new item into the economy in order to stablelize it. The problem with that approach it just stacks onto the orginall problem making matters worse. Then you get the same problem all over again. People use the argument of supply and demand, that only applies to a certain degree and cannot be the foundation to a economic structure. The economy as a whole need to have a balance in order for it to function.