I would say that Lunar is a worthy RPG and definitely still worth playing if you have an appreciation for the classics.  However, it may not be worth paying the exorbitant used prices (the cheapest I found my copy was $60, then one of the discs was all scratched up and nonfunctioning, and I had to buy new discs for $30!  Yikes!).  Anyway, let's see if Lunar withstands the test of time.