This is a cracking price for a film that only came out last year. It is a remake of a previous film called Prom Night but I don't know what either of the films are like.
Next cheapest is £4.89 @ Sendit
A remake of the 1980 horror film Prom Night stars Brittany Snow as Donna - a young woman who couldn't wait for her senior prom! Donna's senior prom is supposed to be the best night of her life one of magic beauty and love. Surrounded by her best friends she should be safe from the horrors of her past. But when the night turns from magic to murder there is only one man who could be responsible the man she thought was gone forever. Now Donna and her friends must find a way to escape the sadistic rampage of an obsessed killer and survive their Prom Night.
Remember there is also 5% quidco on offer to save some extra pennies.