Like most girls' comics Summer and Holiday Specials, this is a collectible title! You very rarely see these for sale on eBay UK or any other auction sites and catalogues. A title to watch!
Phil Comis auctions are about the best for sourcing these. He seems to turn girls comics' holiday and summer specials up like a magician!
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.