① Music Therapy for Insomnia (with minor scratches) ② Music for Courage and Confidence (no scratches) ③ Classical Music to Enhance Concentration (no scratches) ④ Classical Music for Increased Efficiency (no scratches) (Released by Polydor K.K. and Victor Musical Industries, Inc.) Each item is priced at 2,000 to 2,300 yen. I purchased these CDs after suffering from insomnia caused by stress. I listened to them several times before bed and during my free time, but I've been busy lately and they've been in storage at home, so I'm putting them up for sale. CD ① has scratches on the surface, but it plays without any problems. I would appreciate it if those who understand that these are used items would purchase them. I plan to wrap them in bubble wrap for shipping.