I think it was some people who should mind their own business. I will bet the bank that "Sue" isn't going back to the person she got it from with any of the windfall she makes on this auction.
If someone is selling something they know nothing about, I believe they need to do a little work to research it out prior to putting it on the market. If they don't, why should they make a profit? Sue isn't some little old lady that's being taken advantage of. She has over 2,000 sales on Ebay.
A couple of years ago, I bought a fancier Rambow than the one currently listed from an antique dealer that had it listed on Ebay. He had a Buy It Now price on it, which I gladly paid immediately via Paypal. Nobody should have had to tell an antique dealer to consult books if he didn't know what it was worth, and nobody held a gun to his head to determine what the cue was worth. The seller told me he'd paid a tenth of the price for a ladies entire estate that included the cue. Some helpful folks let this guy know what he was selling and he decided not to ship it to me as he now had a better offer. Fortunately, the guy sent me my money back, but he was basically now selling a stolen cue, as I had a Paypal receipt.
If these people were actually doing an act of kindness by warning someone that they were buying something that had been misrepresented, etc., that would be one thing. I think these folks are usually doing it just to be know it all types that used to be hall monitors in school.
I'm sure the folks that appreciate this kind of behavior might not be under the same impression if they were someone who had spent years learning about cues and were hoping for a good deal based on their own ability to spot these deals, and then having someone ruin the deal for them that had absolutely no stake in the deal to begin with. Imagine how popular you'd be if you stood outside a store and told everyone that walked in the door that they could buy cheaper at another store.
My read is that if you're not a part of the deal, stay the hell out of the deal...
Steve