Amazon.co.uk offers the Audrey Hepburn Collection on Blu-ray Disc for $9.04 (£6.28). Add it to your cart and the price drops to $7.53 (£5.23). With $4.44 (£3.08) for shipping, that's the $8 under the best price we could find for a comparable set stateside. It includes Breakfast at Tiffany's, Funny Face, and Sabrina.
This Blu-ray set is region-free, and the films themselves will play on US Blu-ray players, but note that any extras and special features may not.