Last I checked loaded M1 Airs were going for $600 on FleaBay.
I was all set to upgrade to an M3 Pro until I saw the weird SKU binning for the higher memory models and remembered that my M1 Air still does everything that I need it to do and more. I originally bought it strictly for music production but have since used it more generally as I have to use Apple machines for work... I'll probably end up keeping it for another two years and swinging back to a nice Thinkpad with Mint or similar as my dev machine as there are insane deals on 7840-based Lenovos right now.