E-scooter shopping is as easy as mattress shopping. The models change constantly, the prices change constantly, the same scooter seems to be sold by different companies, while the same model with a company will suddenly change specs. Lots of fake or sponsored reviews to the point they're useless. They all feel fine when you try them out, but they seem to vary in terms of reliability over time, with pretty much all models breaking for one reason or another. Keep in mind young males in their teens and twenties are the largest segment of this market, so hopefully us geezers on POA will fair better in rhe longevity of these devices.
I can't speak to the $300 models, but I just bought a Circooter Mate for about $570 shipped. It was the largest, most powerful e-scooter that would fit in the back of my 182. Features a 330 lb payload so even big dudes like me can ride with useful load to spare. Of course I look like a circus bear on this thing, but I don't care if it means I can hit the bbq joint two miles down the road some the airport without having to beg for a crew car.
I did some research on Reddit, which is only slightly better than asking bots or the CCP for a recommendation. Ultimately your long term satisfaction whatever you get will be based on your ability to ride gently, avoid water, be willing to fix or repair as necessary using YouTube videos and cryptic chinglish guidance from customer support.
Good luck!