pokemon card price history Vintage Values 1998-2003 | Base Set, Jungle, Neo Guide Pokemon Card Price History

And the regular version of Sorin, Imperious Bloodlord is valued at around $29

Though in truth given that there isn't exactly a dearth of strong card draw in EDH it's doubtful you'll see much of this though it's also snow that doesn't cost snow, and racking up snow permanents may help in some scenarios

Gym Challenge release date was only 1 month before Southern Islands (June 1999)

That said, every set has something in it that could belong in your binder, and what might make a particular set 'worse' for some folks is highly subjective

Age counters can force your opponent to sacrifice their precious indestructible baby if they cant keep up with the cumulative upkeep cost, so making something like Mystic Remora indestructible won't achieve much