I am not sure if this is limited but it certainly seems cheap in comparison to other stores.
Sainsbury Red Grape Juice 85p per litre - http://www.sainsburys.co.uk/shop/gb/groceries/longer-life-juice/sainsburys-red-grape-juice-1l
Sainsbury Red Grape Juice 85p per litre - http://www.sainsburys.co.uk/shop/gb/groceries/longer-life-juice/sainsburys-red-grape-juice-1l