I've read your replies in here. Some of your requests are misguided. You want Android 8 or 9 because anything newer will come with "more garbage"? That simply isn't true, and there are a plethora of useful features that only arrived in Android 12 onwards.
Any bloatware can be dealt with, any animations you deem superfluous can be disabled, you can change out the launcher for something with zero bloat like Lynx.
You simply won't find anything half reasonable to use that doesn't have a front camera. Stick some tape over it if you are worried.
Ignoring the rest, the best deal you will find somewhere within that price range is a Galaxy S20 FE 5G.
I just bought two brand new units for my parents on ebay for $370AUD which = $250 USD.
This was the last flagship (or flagship adjacent) Samsung with a MicroSD slot. Samsung is well catered for by most of the debloating scripts around github via ADB or you can apply root method and get it clean as a whistle.
SOC is a Snapdragon 865, it supports 5G global bands really well, the cameras kick arse but aren't crazy (12MP), it has a really great wide-angle sensor too. It's got a higher refresh rate but low resolution, so the sizeable battery leads to an extremely generous use time. Multiple days for someone like you.
Honestly I'm not sure why'd you'd like to spend $200 on an absolute piece of junk as per your specs when you could spend $250 on a new in-box device that will blow your socks off.