Like most Pokmon cards, the value of Flapple depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (SWSH Black Star Promos)
Or maybe you want to animate your The One Ring and make another copy of it
However, there aren't anywhere near as many 1st Edition Base Set packs out there as regular Base Set packs, hence the major price difference
I love that she had been one of the most interesting, engaging, competent, characters
They feel streamlined and planned out in a way that I haven't noticed before, and now that there are three sets of older cards to choose from, the new additions in each mix well and feel more focused