How is your OG SE even still functional? On mine the screen started to fall off and the battery started to fail, which, the cost to repair was as much as buying the SE 2020, so that was what I did rather than repairing it.
My OG SE is in perfect shape. Some people are just more careful with things that others. I've had to replace the battery and the Lightning port in January, everything else is still original and works fine.