Amazon.com: Casio Inc. CTK4400 61-Key Touch Sensitive Personal Keyboard with Power Supply : Musical Instruments
Used Casio CTK-4400 61-Key Portable Keyboard - Sweetwater's Gear Exchange
Casio Inc. CTK4400 EPA 61-Key Premium Keyboard Package with Headphones, Stand, Power Supply, 6-Foot USB Cable and eMedia Instructional Software : Amazon.in: Musical Instruments
Casio CTK-4400 61-Key Standard Keyboard CTK4400 - Adorama
Casio CTK 4400 - Piano - musical instruments - by owner - sale - craigslist
Casio CTK-4400 Keyboard (like New) w/Stand - general for sale - by owner - craigslist