If some old lady was selling a box full of Leicas or something I'd have to tell her. I couldn't live with myself.
I did buy a Bronica SQA kit off craigslist for a hundred bucks and sold it on ebay for more than three times that amount but I have no problem taking advantage of people who know how much their stuff is worth.
That sounds like the same thing. That hypothetical old lady clearly doesn't know what her stuff is worth.