I would think it might be quite difficult to sell on a regular basis owing to the nature of the product but ultimately it comes down to basic economics. If you don't have to commit to booking a pitch long term then i don't see why you shouldn't give it a go, if you didn't want to do that at first you could always try & give/sell a few jars to butchers & the like that have stalls.
If things aren't going to well get a few friends to be a fake production team & make out you are being filmed for tv, you're sell out in double quick time