Can you help to identify these frames, bikes or parts?

panasonic mountain bikes...
my father in law has a panasonic mtb with shimano xt groupset.
he was given it when he worked for panasonic in the 90s, ive always wondered if its worth anything??

it's worth been ridden cause they are quality builds, maybe worth as a collectible
if it's in good shape etc.

post some photo and think twice if you like to sell it