This was my 10th trade which shows I was satisfied with the system (I'd had one book rejected due to quality ... okay, I judged it incorrectly) ... until this time: 3 CDs were included - all pristine having been purchased from a reputable online retailer only 2 years ago - on the grounds that they were "Not original disc". In fact, all three were "manufactured by Presto Music under license from the original record label." and hence legitimate products. This demonstrates that Ziffit is not perfect and the trader does risk being cheated, albeit innocently, because the staff make mistakes - Ziffit's decision is final so the trader loses money. Payment for items accepted is swift but such mistakes by Ziffit make me doubt I'll use them again.