Why don't u add another tab to gtl where players can make advertisment. Basicly the same as those on forum in trade corner. People would be able to show their ev/breeding services. That would be a good way of preventing player spamming with tons of for example bad dittos too. They could simply write selling bad dittos 2k each one in their advertisment. That would be a good way to add few more taxes like posting add 15k. Every bump 5k. (1 ad per player and 1 week expire time if post wasn't bumped.) That might fix both trade chat spam and people listing 10 pages of the same thing. Seeing if seller is online world be usefull in this case. If he is off players could become more likely to use mail system.