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Best Buy: Casio Portable Keyboard with 61 Standard-Size Lighted Keys LK-230
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HQRP AC Power Adapter for Casio LK-220 / LK220, LK-230 / LK230 Keyboards 884667589579 | eBay
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BERLS 9V Power Supply Adapter for Casio Piano Keyboard CTK Series CTK-120 CTK-330 CTK-491 CTK-515 CTK-551 CTK-630 CTK-700 etc. - AliExpress Home Improvement
Used Casio LK-230 Electric Keyboard – Allegro Music Service
Casio LK-230 – Eastside Music Supply
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9V AC/DC Power Charger Adapter For Casio LK-100 LK-110 LK-230 LK-270 Keyboard - Walmart.com