Amazon trade in allows you to trade in your unwanted books (text books tend to do best) and earn Amazon vouchers. Until 30th June, trade in at least £10 worth of books and you will receive an additional £5 promotional credit code to use next time you spend £10 or more on items sold by Amazon.co.uk
You can view the terms and conditions of the promotion here.
Trading your items on Amazon is easy, postage is free and you can earn vouchers to spend on Amazon.co.uk.