Can't say it's possibly unbalanced
Some other elements that can heavily affect price are non-Standard bonus cards, foreign languages, and time before rotation
Surge, League Card x1, XY 206 Gym Badge Holo Erika, League Card x1, XY 207 Gym Badge Holo Koga, League Card x1, XY 208 Gym Badge Holo Sabrina, League Card x1, XY 209 Gym Badge Holo Blaine, League Card x1, XY 210 Gym Badge Holo Giovanni, League Card x1, 53/108 Mew Holo 1st Place, League Card x1, 53/108 Mew Holo 2nd Place, League Card x1, 53/108 Mew Holo 3rd Place, League Card x1, 53/108 Mew Holo 4th Place, League Card x1, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Europe promo x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Europe promo - Staff x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Europe promo - Top 8 x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Europe promo - Champion x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Oceania promo x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Oceania promo - Staff x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Oceania promo - Top 8 x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Oceania promo - Champion x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Latin America promo x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Latin America promo - Staff x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Latin America promo - Top 8 x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships Latin America promo - Champion x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships North America promo x1, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships North America promo - Staff x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships North America promo - Top 8 x0, 90/108 Double Colorless Energy Colorless Reverse Holo 2017 Season International Championships North America promo - Champion Black Star Promo Cards & Extras
If that sounds convoluted, please spare a thought for those of us who write or edit for a living and now have to do work while playing Magic: The Gathering
