One of my pet hates is buying second hand CDs from 'you know where's which are listed as being in "Very Good" condition, then when it/they arrive and you open the the package, anticipating a decent CD, you open it, the lid falls off, you look at the CD, it's scratched all over and you feel disappointed and that the CD should have been described as "acceptable", or the company that listed it, should have described the condition, but they're too big and busy a company to care. I find one particular company, who also sells books have offended me this way, more than once.
To be fair to them they usually offer some way of appeasing me when I complain. I always point out that, I'm a regular buyer of their items and I won't leave them negative feedback, because I never leave negative feedback ever. I just don't leave feedback if I've been disappointed by a purchase.