Once again we are finding increasing cases of merchants with no remaining gold, but an inventory full of a specific, crafted item. By this, I mean row upon row of one single type of item, whatever it may be.
Firstly, this is cheese. No merchant would spend their entire gold on copious amounts of a single item.
Secondly, this is incredibly frustrating for the people that don't abuse the system and just wish to sell the loot that they've found while out adventuring, but cannot do so, due of every merchant being broke.
We rely on common sense from the players in these matters, but should push come to shove, it will not be beyond our means to have merchants start to refuse to serve individual PC's altogether.. and remember, merchants talk, so news of such spreads.
"Men never do evil so completely and cheerfully as when they do it from a religious conviction."
Blaise Pascal (1623 - 1662)