Sanitas shiatsu massage cushion for ~50€ including shipping. Next best price is ~62€

  

• Sanitas SMG 186 shiatsu massage cushion for soothing and powerful back massage
• Price: ~50€ including shipping. One day deal
• 4 massage heads (rotating in pairs) move up and down along the spinal column
• Massage areas: upper, lower or entire back 
• With light and heat function
• Detachable and washable (30°)
• Possible to use on almost all chairs, sofas and other seating with sufficient seat depth

Here is the deal