4K Blu-ray fans rejoice! 4K Blu-ray player discounts are rare, so we recommend snapping this one up if you're tempted. Five stars Save £97 Sony UBP-X700: was £249 now £152 at Argos The Sony UBP-X700 was already a great value 4K Blu-ray player, and now, with nearly 40 per cent off, it's an absolute steal. If you're yet to dip your toes into the world of 4K Blu-ray, you're in for a treat. The UBP-X700 has been a staple of our best Blu-ray and 4K Blu-ray players page since we reviewed it back in 2018.