Professor Oaks New Theory 101/123 price
Pokémon · HeartGold SoulSilver (2010)
Updated: October 23, 2026
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Professor Oaks New Theory 101/123 from HeartGold SoulSilver (2010) is worth $0.72 raw (ungraded), based on real sales. Check the version: the Reverse Holo sells for $7.01. It is the #65 most valuable of the 65 HeartGold SoulSilver cards we track.
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