61-key Keyboard. Casio CTK-631 Optimus MD-1200 Keyboard. Used But Works Fine! For $50 In Tustin, CA | For Sale & Free — Nextdoor
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Guy-Tech 9V AC / DC Adapter Compatible with Casio CTK-631 CTK-481 Keyboard Power Supply Cord Cable PS Wall Home Charger Input: 100 - 240 VAC 50/60Hz Worldwide Voltage Use - Walmart.com
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