I think most folks are not dishonest about their games, they just are not very familiar with them. For good or bad. That makes it hard for them to give an honest description and to point out potential flaws or issues. I have purchased dozens of machines that once their in person I point out something that was not brought to my attention previously and I can tell the person selling truly had no idea the flaw was there. Lots of folks own these machines and are not knowledgeable about them.
And I agree with Forceflow, most people can't take a good picture to save their life.
But if you show up in person you have every opportunity to look it over and decide regardless of shitty descriptions or crappy pictures.
Thanks
Blake