The biggest issue with the CeX thing is that they sell legit copies and copies with reprinted covers for the same price, and don't make any effort to let people know there's a difference.
This dude's channel has a pretty good series of videos on the whole thing, including detailing what exact laws CeX are in violation of, as well as a bunch of other stuff:
This has really put me off buying ANYTHING from CEX. I find it astounding that they are getting away with this. Watchdog needs to get involved imo.