Like any of the other cards from that era, they have taken a mighty hit on value, yet so many people are holding on to them at higher asking prices still. You can probably find several on ebay for cheaper.
They were hard to hit (specific players) back in the day, although you got one per box (for the regular SC FDIs), but that kind of rarity is all but gone now with 1/1s and print runs of less than 10-25 copies. I remember the 1994 Collectors Choice Gold signature Frank Thomas was $150 when they were new. Now you can probably get one for $10 or less. I'm guessing there were several 100s if not 1000s of those 1/box parallels in most cases. Remember how popular the Donruss Elites of 1991-1993 were, with 10,000 copies! They were still tough to find because Donruss printed a TRILLION cases of that stuff. Those still sell pretty well, but nowhere near their peak. I remember thinking if I could get the 92 Thomas for less than $100, I would be happy. Even the highly coveted 93 Finest refractors had close to 250 copies. Those were topping 4 figures at one time! Imagine paying $1000 or more for a card numbered to 250 now. People are still shelling $100+ for star 93 refractors like Thomas, Maddux, Ryan, Piazza, etc!