I was prompted to once again sell some items to yourself by an email offering an extra £5 payment if I sold £10 of goods. I collated an order than was exactly £10 but when trying to close the order there was no obvious place to enter the voucher code. Having gone round endlessly trying to find this, I eventually resorted to clicking the 'Complete Trade' button, hoping that there would be a facility to then enter the code but no, the £10 trade was just completed and I lost the chance to claim the £5. I assume there was some way to enter this but this was well hidden with the hope that most sellers would just give up trying to find it. I normally like dealing with Ziffit but this felt like a cheap trick.