I was grocery shopping at Target and saw this player, and had to pick it up. It has HDR-10, but not Dolby Vision.
One of my Sony TVs only has HDR-10.
Best Buy has it for 249 and I have seen them anywhere from 249-299.
HERE IS THE CATCH: IT IS NOT ADVERTISED ON THEIR WEBSITE, IT WAS IN STORE CLEARANCE. My store had 5 of them, brand new retail in the box, full warranty etc.
https://www.target.com/p/sony-ubpx800-4k-uhd-blu-ray-disc-153-player-black/-/A-52167191
Listed for $299.99 but in store it was marked clearance. Not sure if it's every store, but if you are looking for a 4K player and don't care about Dolby Vision, this is an incredible deal on a great unit.