Buy/sell signs work for buckets of fish/axolotl, but only if bought from the sign not caught by player.

[beecancode]

I have a mall set up for players to buy & sell, and they are able to buy buckets of fish/axolotl/tadpoles, which works fine. They can even sell those buckets of fish back. But say the player caught some fish in a bucket and wanted to sell them, it says "You don't have any bucket_of_salmon in your inventory" or something similar.