i am old and got them before they came back mad expensive. and once in a while still landed a steal.
i even landed a second 909 for $900 and it took me two days to flip it for $1900.
i kept the original plastic case.
they're all the shit. serious, 707 thanks to individual outs can be amazing.
if i could only keep one though it'd be the 909. 808 has that classic boom kick, but the 909 is entirely a powerhouse.