Feature description

If you have a bucket of cod, and you try to sell them with a sign like this:

[Sell]
1
cod
$5

It acts like you have no cod. If you have raw cod itself in your inv, it works. As there is a live "raw" cod in the bucket it would make sense for the sign to accept that as one raw cod and buy it. It could then swap the bucket of cod item in your inv for an empty bucket item.

How the feature is useful

It makes logical sense