My first trade with ziffit went without issue, so I used them a second time. I decided to trade in a book for which I was offered £5.50. I also traded in a couple of lower value books. When I got an email back saying I was being paid, next to the book in question it said expired and I was being given £0. This book was in as good as new condition and is worth over £20 new on Amazon (rrp of £27). Ziffit have effectively stolen my book and I have no doubt they will sell it (see below) . I am shocked by this and advise others to never send high value books to them. Absolute crooks. Just happens to be my highest value book that 'expires' even though I posted it within a week of accepting the offer. I have also just noticed that their sister site World of Books (they sell the books you trade in) now has 1 copy of this book in stock in very good condition which they are selling for £9.99. Coincidence? They are giving me £0 of this. Their t&c's allow them to reject and 'dispose' of books (in this case steal and sell anyway). Think twice (actually maybe 3 or 4 times) before using them. You have been warned.