For me the amazingly good ones offsets the bad ones. Recently I purchased a Canon A1 for very little and when it arrived they a forgotten to mention that it came with a MA power winder as well as a 50/1.4. The "not arrived as indicated" was not used but I did mention it to the seller and they told me "you have the camera so we can't use it anyway. I hope you don't mind" But needless to say that is a very rare occurrence. You just need to ask the right questions and don't ask any stupid ones everything seems to work out on a one to one communication. And you do have back-up with Paypal.