The vendor is usually made to "eat" the charge.
At a farmers' market I recently visited, one vendor boasted that all his chickens "retained their dignity throughout their life."
At the age of twenty he was gaining his livelihood in the streets of Moscow as a vendor of meat-pies.
The interests of the tenant were so carefully guarded that the prices obtainable were ruinous to the vendor unless he had other resources.
With the rapid flow of information about businesses and their products, along with the ease of "checking up" on a vendor, good businesses will get more business and push out the bad ones.