Errigal is a 751-metre mountain near Gweedore in County Donegal, Ireland. It is the tallest peak of the Derryveagh Mountains and the tallest peak in County Donegal. Errigal is also the most southern and the highest of the mountain chain called the "Seven Sisters" by locals. Wikipedia
a few people come down from Northern Ireland and place their items by and on their cars on main street to sell. People do stop and look but I don't know how successful the sellers are. A windy or rainy day would cause some problems I would think.