Amazon UK offers the Fast & Furious 7-Movie Collection on Blu-ray / Digital for $25.98 (£19.99). Add it to your cart and proceed to checkout to drop it to $21.65 (£16.66). With $4 (£3.08) for shipping, that's $9 under our July mention and the lowest total price we've seen. (It's also a current low by $34.) It includes The Fast and the Furious, 2 Fast 2 Furious, The Fast and the Furious: Tokyo Drift, Fast & Furious, Fast Five, Fast and Furious 6, and Furious 7.
This Blu-ray set is region-free; the movie will play on US Blu-ray players, but the extras and special features may not.