[Blu-ray] The Ring Collection £36.48 @ Amazon
Decent price on this set. It's £44.99 in the BOGOF @ Zavvi so you can pair it with another box-set if there's something of similar value you want for a better price. You can also buy 2 copies from Zavvi and get one free. Useful if you have a friend that wants it as well.
* Please note that all prices are correct at the time of posting. However prices can vary quickly and significantly without warning.