Clutch pivot ball, they die for no reason, and that's a gbox out job. 450 in labour, for a $20 part, or 70$ part if you decide to go nismo. Or it might have been done already. So take a look.
And, these cars are actually pretty reliable. Though old, if they're well taken care of, with regular oil changes and stuff, it should last man. But save for a rebuild just in case. What's your budget?