I also bought a 2nd hand Fold 4 for $700... it lasted a year before the wifi/bluetooth broke, it stopped folding all the way, and eventually stopped booting up.

I also bought a 2nd hand Fold 4 for $700... it lasted a year before the wifi/bluetooth broke, it stopped folding all the way, and eventually stopped booting up. Seem to always have reliability issues with Samsung phones. Hopefully the 6th iteration is more stable.