Induction charger from German company Terratec, used but in great condition. I can't find the original cable, but will include the high-end Oehlbach one that I've been using, which is worth £20 on its own. The plug is EU type, so you'll need an adaptor, but they can be bought online for under £2. 

The wireless energy source TERRATEC ChargeAIR dot! offers an induction charging surface for a comfortable power supply of compatible smartphones. With up to 10W output and automatic detection, it charges the phones very fast and secure. Its rubber coating enables a secure hold, while the silver casing provides a noble finish and makes it the high-end accessories on the desk, the nightstand or  the coffee table.

• Charges smartphones wireless
• Rubber coated surface for a secure hold
• Fast an wireless charging thanks to 10W output
• 5W/7,5W or 10W output with auto detection
• Input: 5V / 2A or 9V / 2A max.
• Charging frequency: 110 - 205 kHz
• Quick charging adapter and 100 cm USB cable included
• Conversion rate of 80%