I didn't read them all, but there was not one I did read that was not someone either trying to rip someone off or was SO CLUELESS that they became excessively defensive and hostile towards the guy, again this is assuming the transcripts are accurate.
Again, this has happened to me when I try to help people out who have overpriced things, to the point where they are calling me names or calling me a liar! Who does that???
People who don't know any better should take the help and move on. When they get nasty, I can pretty much assume they are not in the clueless category or deserve the ribbing anyways.
Too many people read too many stories of amazing finds at flea markets, garage sales, newspaper ads, etc. Everybody is afraid they'll flip through the channel one day, see the guy they sold their collection to on the 'antiques roadshow' just in time to catch the crawl at the bottom: 'vintage baseball cards, $20 craigslist sale, est value:$1500-2000'
People get defensive all the time, because too often the people trying to 'help' the seller ONLY do so if they are overpriced. If they were selling a NrMT 61T Mantle for $20, the buyer wouldn't very helpful, they'd hand them the $20, run back here and brag about the 'steal of the century'.
There is probably some truth to that, but I personally have helped people who have underpriced things or had poor descriptions of items that are worth something decent.