Traveling Salesmon

Due to the large number of items existing in the Pokémon universe it is rather difficult to fit all of them into dungeons on dice.
Thus I would like to suggest the introduction of a traveling salesman on the site. This character would either appear in one town (maybe Aileron?) for a few days per month or would have to be rolled in a dungeon. Only if the salesman is present or rolled (depending on which system would be used) one has access to his shop. In this shop he would sell very few wares, each item only available once. These items would be rarer items and items currently unavailable on the site, both sold at exorbitantly high prices. Each month or so the salesman's stock changes. The money used to buy his items would simply be removed, noone recieving it.

The purpose behind this is threefold.
First and foremost this addition would allow the introduction of as of yet unavailable items without having to resort to high-ranking missions.
Secondly the option to roll the salesman in dungeons would add a bit more depth to the site, allowing encounters with friendly NPCs in the dungeon(s).
And thirdly such an addition would allow for Poké to be drained from the rather bloated economy, reducing inflation and preventing the site from being flooded with Poké.