Amazon.co.uk offers the A Nightmare on Elm Street 1-7 Collection on Blu-ray Disc for $27.21 (£17). At checkout, it falls to $22.69 (£14.17). With $4.83 (£3.08) for shipping, that's the lowest total price we could find by $12. This 4-disc set includes all seven of Wes Craven's films and a bonus feature DVD.
Of note, although the movies themselves will play on US Blu-ray players, the extras and special features DVD may not.