Amazon UK offers Jurassic Park: Ultimate Trilogy on Blu-ray Disc for $10.43 (£7.90). At checkout, it falls to $8.69 (£6.58). With $4.07 (£3.08) for shipping, that's $3 under our March mention and the lowest total price we've seen. (It's a current low by $24.) It also includes an UltraViolet copy.
This Blu-ray set is region-free, and the films themselves will play on US Blu-ray players, but note that the extras and special features may not.