One of the tenets of a farmers' market is make it, bake it, or grow it in British Columbia. We like to have a person who actually grew the product there to have that communication with the consumer.
A number of trials have actually been done where three or four farmers will provide product to another grower, who will then sell that to the consumers. There has to be a good exchange of information beforehand to make sure that the person selling knows the information of what is the product, how was it grown, what's its organic status, if any, whether there are any treatments on it, all those sorts of things.
It does seem to work, but on a very small scale.