Show me where they're illegal for sale in the US. The FCC tried and failed to restrict their import
in 2018 and that led to a firestorm of internet hysterics that's still floating around but they aren't, and never were, illegal for sale in the US.
Don't panic buy anything
You've got plenty on time to do your homework. Youtube has all the info you need to learn what you need for YOUR
prepping requirements. ...just take it all with a huge grain of salt
Any of the radio your looking at will work together just fine and all the menus will be close enough to the same that you'll probably never notice the difference. All the ones you show have a Kenwood style mic jack so all the cables and accessories will be interchangeable. (I think all the cheap chinies radios use Kenwood jacks except the waterproof ones)
Look for "dual band". Tri-band is fine but you'll likely never use the 1.25m band so don't pay extra for it. 8w is better than 5w but a good antenna and good operating technique is a heck of a lot more important than the extra 3 watts.
Don't spend a lot of money on package deals with a bunch of doodads you'll never use. Buy barebone radios and pick your own doodads separately.
IMHO if cost is an issue, when the SHTF it's better to have 3 UV-5Rs than one BF-F8.
Most important, any radio is a just a paperweight if you or the folks you want to talk to don't know how to use them