Gun shows are slightly worse. There are lots of so called honest people dumping their problem items onto unsuspecting people with a clear conscious. They ruin it and then seek relief by offing it onto some sucker.
The level of ignorance is amazing and ego gets in the way of learning. I NEVER ask anyone at a gunshow a question about anything beyond "Do you have??" People who go shopping without thoroughly knowing what they are looking for are sheep ready to slaughter and deserve their fate. Expecting Ebay to solve your ignorance is asking a lot. They have to scatter bread crumbs to find their office.