The app isn't working on my phone or tablet as when I use the scanner on both things I get a price and then it won't let me save the trade or complete the trade so I have to enter the barcode manually. As with last time there was £5 difference in the two offers. Last time they really tried to help me fix it, when they couldn't they honoured the trade I had on the app. This time the said that things change and offers vary. I replied but they haven't bothered to reply to me. Plus they rejected 3 of the books so I only got £4.25 for what should have been an £11 trade