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These are the all time lowest prices for these games.
Puyo Puyo Tetris: https://www.fanatical.com/en/game/puyo-puyo-tetris
Shining Resonance Refrain: https://www.fanatical.com/en/game/shining-resonance-refrain
Enjoy!
Nice find. Here's hoping more of the series gets ported to PC. For anyone wondering where to start in the series (it can be a little daunting) Yakuza 0 is pretty cheap usually and a good primer to the whole thing.