They certainly were Nelson and were even around in steam days.Depending on how each economy was doing,shoppers would go either way for bargains,although my memories from the 70s and 80s are from shoppers from the south coming north for bargains. In the early 80s, I had work friends from Balbriggan and Dublin who would come north in the train,get their bargains for their kids from places like Argos,drop them of at my house,go home in the train with nothing to declare and I would bring their goods down in the car a couple of weeks later!