Amazon are running a survey with five prizes of £50 Amazon vouchers up for grabs. The survey asks questions regarding the size of your business and your opinions of trading on eBay and Amazon. However you do need to be resident in the UK to enter.
To be in with a chance of winning you simply need to complete the survey by midnight on the 21st August. The survey only takes a few minutes to complete and I can think of plenty of uses for £50 to spend on Amazon.