Like most Pokmon cards, the value of Bellsprout 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 (Legend Maker)
Starting with this update, all digital-only cards on MTG Arena will have the MTG Arena "A" down where the holofoil rarity stamp usually is so they can be clearly identified
Edition - First Edition and Shadowless cards are worth more
With the gradual development of the OCG, this card was banned for disrupting the OCG's balance due to its excessively powerful effect
3 Lost Origin $374.98 A Giratina Like No Other Lost Origin might have the most top-heavy set in the Sword and Shield era, with a noticeable gap in value between its two most valuable cards and the rest
Your best, most economical option is to play Jumpstart mode